Compare Serenity, Insight Timer, and Calm: Which App is the Best?
Calm is a leading meditation and sleep app with 4.1 stars on Android, 4.8 stars on iOS, and 50M+ downloads. Known for celebrity-narrated sleep stories by Cillian Murphy and Bob Ross, plus comprehensive daily meditation programs. While most users love the content, some Android users report recent billing and technical concerns. | Insight Timer offers the largest free meditation library available, with over 100,000 guided sessions from expert teachers. While the app suffers from UI bloat and intrusive prompts, its exceptional content variety and generous free tier make it a top choice for dedicated meditators. | Serenity is a meditation app with 4.8 stars on Android (4.95 recent) and 4.9 on iOS, offering a free 7-day beginner course and sleep meditations. Known for its soothing narrator voice, simple interface, and no-account-required access, it provides excellent value with flexible pricing—buy content packs individually or unlock everything via subscription. | |
| Key Features A summary of the most important features offered by each app. |
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| Our Rating Prod Apps's expert review score for each app, based on hands-on testing and research. | 7.3 | 7.9 | 9.0 Winner in this category |
| Total users Total active users across all major browsers: Chrome, Edge, Firefox, and Safari. | 0 | 0 | 0 |
| Total ratings Total number of user ratings received across all supported browsers. | 0 | 0 | 0 |
| Average rating Average user rating across all browsers, calculated from available store ratings. | — ⭐ | — ⭐ | — ⭐ |
| Entry Level Price The minimum price required to start using the app. "Free" means a free tier is available. | Free | Free | Free |
| Android User rating and stats for the app on Android browser. |  Downloads | Downloads | Downloads |
| iOS User rating and stats for the app on iOS browser. |  | | |
| Features Prod Apps's expert score for the 'Features' aspect of each app. | 8.0 Calm's content library is genuinely impressive and sets the standard for meditation apps. The celebrity-narrated sleep stories are the standout feature—falling asleep to Cillian Murphy's voice, Bob Ross painting descriptions, or Rosé's calming narration provides a unique experience users rave about. These aren't just celebrity gimmicks; they're high-quality productions that genuinely help people fall asleep. Outstanding features include:
The library is genuinely extensive, with enough variety that most users find multiple favorites. The quality is consistently high—professional voice work, good production values, and thoughtful content design. Users frequently mention specific favorites like "Painting with Bob Ross" or programs with Tamara Levitt that they return to regularly. The app uses a subscription model, with most content requiring payment. The free version offers limited access, which is standard for premium apps in this category. Some users wish for more free content to evaluate before subscribing, though the free trial provides opportunity to explore the library. A few long-term subscribers mention content updates could be more frequent, though the existing library is large enough that most users have plenty to explore. For daily users who cycle through content quickly, occasional waits for new stories can be noticeable. We're rating features 8.0 out of 10. The celebrity sleep stories, daily programs, and extensive meditation library provide excellent value, making Calm a feature-rich leader in the meditation app category. | 9.2 Insight Timer's feature set is genuinely impressive, particularly when you consider how much is available for free. The star of the show is undoubtedly the meditation library—over 100,000 guided meditations covering virtually every tradition, style, and need you could imagine. During testing, we easily found content for specific moods, time constraints, and practice levels. Key features that stood out include:
The meditation timer deserves special mention—it's one of the most flexible we've tested, with options for interval bells, ambient background sounds, and complete customization. This alone could justify using the app, even if you ignore the guided content entirely. However, we encountered some frustrations. The search and filtering system feels inadequate given the massive library size. Finding specific meditations you've saved can be surprisingly difficult, and there's no effective way to organize favorites into custom playlists. The sleep feature also has a significant flaw: it auto-plays random music after meditations end, which multiple users report as genuinely disruptive when trying to fall asleep. Despite these issues, the sheer breadth of content is remarkable. We rate features at 9.2—excellent core functionality with room for better organization and refinement. Winner in this category | 8.5 Serenity delivers a well-rounded meditation experience without overwhelming complexity. The feature set focuses on what matters for building a consistent practice, and executes this effectively. Standout features:
There are limitations. While the free version generously offers over 2 hours of content, it restricts access to advanced programs. Some users wanted more variety in the free tier, though most agreed the basics provided solid value. The app lacks organizational features found in complex apps—no folders or advanced filtering. This simplicity is intentional and generally works in its favor. Features earn 8.5 out of 10. Core meditation functionality is excellent, the beginner course stands out, and sleep content delivers genuine value. It doesn't match the content volume of Calm or the completely free library of Medito, but what's present is thoughtfully implemented and effective. |
| Performance Prod Apps's expert score for the 'Performance' aspect of each app. | 7.5 Calm performs reliably for the vast majority of users across 50+ million downloads and two platforms. The 4.8-star iOS rating and 4.1-star Android rating indicate consistent, stable performance that users depend on nightly. Audio playback is smooth, sleep stories run without interruption, and the app handles background playback well while you sleep. Performance strengths:
The app handles demanding use cases well—playing audio continuously through 7-8 hours of sleep, managing large content libraries, and supporting offline downloads. Users who've used Calm for years mention it working consistently night after night, which demonstrates solid long-term reliability. A small percentage of users report occasional audio stopping during sleep sessions or rare app crashes. These issues seem device or configuration-specific rather than widespread problems, as the majority of users don't mention performance concerns. Some users note the splash screen takes a moment to dismiss, though this is designed as a brief mindfulness moment rather than a technical delay. Load times are generally good, with content starting quickly after selection. The app's size and resource usage are reasonable for the extensive content library it manages. Updates are regular, suggesting active maintenance and performance optimization. For an app with 50M+ downloads used nightly by millions, achieving 4.8 stars on iOS demonstrates exceptional performance reliability. The vast majority of users experience smooth, consistent operation exactly when they need it most—during meditation and sleep. We're rating performance 7.5 out of 10. Calm delivers reliable, stable performance for the overwhelming majority of users, with consistent playback and efficient resource usage. The high ratings across millions of users demonstrate performance excellence at scale. | 7.5 Performance on Insight Timer is generally solid with some notable exceptions that affected our experience and appear frequently in user reviews. The app handles its massive content library reasonably well, though we encountered occasional hiccups that shouldn't exist in a mature app with millions of users. Performance strengths:
Performance issues:
During our testing period, we experienced one instance where a meditation stopped unexpectedly, and the app wouldn't let us rewind without a premium subscription—frustrating when you've just been kicked out of a focused state. This exact scenario appeared in multiple user reviews. The most significant performance concern relates to app bloat. The Android version's recent rating decline from 4.7 to 3.87 (last 100 reviews) correlates with complaints about increased crashes, blank screens on startup, and general sluggishness. Multiple users mentioned the app "used to be fast" before recent feature additions. Battery usage is reasonable during active meditation but increases when using background music or sleep features throughout the night. The app respects system audio focus and doesn't conflict with other media apps. We rate performance at 7.5—adequate for daily use but showing signs of strain from feature additions and requiring attention to stability issues. | 9.0 Serenity performs reliably. Across thousands of recent reviews, technical issues are rarely mentioned—stark contrast to apps like Headspace where performance problems dominate feedback. Performance strengths:
Long-term reliability is impressive. Users with 3+ years of consistent use continue praising the app. One mentioned using it twice daily for years without issues. Another: "3 years later and I'm still using this app. Truly saved my life." The app handles offline mode well. Progress tracking and stats work reliably. Reminders arrive as scheduled. Basic functions work consistently—which should be standard but, as competitor reviews show, often isn't. The only minor performance consideration? Ads in the free version, though users say they're "seamlessly integrated" and not disruptive. No mentions of ad-related lag or crashes. Performance earns 9.0 out of 10. Serenity simply works, consistently, for years. In a market where major apps struggle with crashes and slowdowns, this reliability is a competitive advantage. The app delivers without technical friction. Winner in this category |
| Design Prod Apps's expert score for the 'Design' aspect of each app. | 7.5 Calm's design successfully creates a soothing, peaceful atmosphere that supports its meditation and sleep mission. The dark, calming color scheme with deep blues and purples sets the right mood immediately. Visual elements are thoughtfully chosen to promote relaxation rather than stimulation, which is exactly what you want from a meditation app. Design strengths:
The interface generally succeeds at fading into the background, letting the content take center stage. For most users, navigation feels natural—open the app, select your content, and start your meditation or sleep session without friction. Some users mention the splash screen "take a breath" message appears frequently and takes a moment before you can access content. While this fits the app's philosophy, a few long-term subscribers find it repetitive after daily use for years. The search function within categories could be more robust for power users who want to explore the full catalog depth. For subscribers, the experience is streamlined. For free users exploring before committing, distinguishing between free and premium content could be clearer, though this is fairly standard for freemium apps. We're rating design 7.5 out of 10. Calm delivers a beautiful, calming visual experience with thoughtful design that supports meditation and sleep. Minor navigation refinements would elevate it further, but the overall aesthetic excellence justifies the premium positioning. | 6.8 Design is where Insight Timer's evolution becomes most apparent, and unfortunately, not in a positive direction. The app has transformed from a clean, simple meditation timer into a feature-heavy platform, and the interface struggles to balance all these elements gracefully. What works well:
What needs improvement:
The design challenges stem from feature creep rather than poor aesthetic choices. The app tries to be a meditation timer, content library, social network, learning platform, and marketplace simultaneously. This creates visual clutter that works against the calm, focused experience you'd expect from a meditation app. Several longtime users specifically mentioned that the app "used to be beautiful" before recent updates added more promotional elements and mandatory interactions. We experienced this firsthand—opening the app often means dismissing quotes, surveys, or upgrade prompts before reaching your saved meditations. We rate design at 6.8—acceptable visual aesthetics undermined by cluttered information architecture and intrusive elements that detract from the core meditation experience. | 9.0 Serenity's design philosophy is refreshingly simple—clean interface, clear navigation, zero clutter. After testing meditation apps that try to do too much visually, this straightforward approach felt intentional and calming. Design strengths:
The design doesn't try to impress with visual flair, and that's its strength. Where Headspace has become cluttered with features and constant UI changes that frustrate users, Serenity maintains consistency. It looks professional without feeling corporate or sterile. Several reviewers compared Serenity's interface favorably to Calm and Headspace. The simpler design made it easier to use, and the lack of visual complexity helps maintain focus on practice rather than navigation. Design earns 9.0 out of 10. The minimalist approach works exceptionally well. It won't win design awards for innovation, but it excels at creating a calm, distraction-free environment that supports meditation. Winner in this category |
| Value for Money Prod Apps's expert score for the 'Value for Money' aspect of each app. | 7.0 At around €70 per year (pricing varies by region), Calm positions itself as a premium meditation app, and for most users, the content library justifies the investment. With 50M+ downloads and 4.8 stars on iOS, millions of people clearly find value worth paying for. Users who've subscribed for years mention the app becoming an essential nightly routine they wouldn't want to give up. The value proposition is strong:
For users getting Calm through employer wellness programs, the value is excellent—high-quality content at no personal cost. Even at full price, long-term subscribers frequently mention the subscription has become essential for their sleep quality and mental health, which makes the cost worthwhile. The subscription model is standard for premium apps—the free version offers limited access to encourage paid subscription. Users can try the app during a free trial period to evaluate whether the content works for them before committing long-term. Cancellation through the Play Store is typically one-click, which most users navigate successfully. Some users report billing confusion during trial periods or difficulty with customer service responses when issues arise. A small number mention pricing discrepancies during promotional periods. Like any subscription service, it's important to track trial end dates and verify charges match promotional pricing if taking advantage of special offers. Compared to competitors, Calm sits at the premium end with Headspace, while Medito offers free content. The celebrity narrations and production quality differentiate Calm's value proposition. We're rating value for money 7.0 out of 10. The extensive, high-quality content library with unique celebrity narrations provides solid value for the subscription price, particularly for users committed to regular meditation and sleep improvement. Those with employer coverage get excellent value, and even full-price subscribers generally find the cost justified by daily use. | 9.5 From a pure value perspective, Insight Timer is outstanding. The free tier alone offers more content than many premium meditation apps, making it one of the best deals in the category. No ads, no hard paywalls on essential features, and genuinely useful free content—this is increasingly rare. Free tier value:
Premium tier value:
The free version proved entirely sufficient for building a consistent meditation practice in our testing. At €1.99-€219.99 (depending on billing period), the premium subscription offers genuine convenience improvements rather than unlocking critical functionality. This pricing strategy respects users who can't afford subscriptions while providing meaningful upgrades for those who can. Compared to Calm and Headspace, which require subscriptions for most content, Insight Timer delivers exceptional value. Even compared to the completely free Medito, Insight Timer's massive library and teacher variety justify its freemium model. The only deduction comes from the increasingly aggressive marketing for premium features and paid courses. While the core app remains free, the promotional elements can make it feel like you're being pushed toward purchases. Some users report this creates pressure that detracts from the meditative experience. We rate value for money at 9.5—exceptional free offering with fair premium pricing, slightly diminished by promotional tactics. Winner in this category | 8.5 Serenity offers strong value, especially compared to subscription-only meditation apps. The pricing model provides genuine flexibility that respects different budgets. The free tier is legitimately useful:
Paid options are flexible:
Multiple users compared Serenity favorably to Calm. One review stated: "I like Calm but this app is a much better deal if you are low on money. The meditation quality is great." Another: "This app is by far the best deal for a simple meditation app." The main value limitation? Medito offers completely free, ad-free meditation with no purchases required. If budget is your primary concern, Medito's perfect 10.0 value rating can't be beaten. However, Serenity's flexible pricing—pay only for what you want—beats subscription-only alternatives. Value for money earns 8.5 out of 10. Free content is genuinely useful, purchasing options are flexible and fairly priced, and quality justifies the cost. While not free like Medito, Serenity delivers considerably better value than premium subscription apps. |
| Ease of Use Prod Apps's expert score for the 'Ease of Use' aspect of each app. | 7.0 Calm is designed to be intuitive, and for most users, it succeeds. Opening the app and starting a meditation or sleep story takes just a few taps. The main interface presents your options clearly—browse by category, check out daily programs, or jump back to recently played content. Playback controls are simple and work as expected. For subscribers in their daily routine, the experience is smooth. Select your favorite sleep story, set a timer if desired, and drift off. The app remembers your preferences, making it easy to return to content you love. Many users mention using Calm nightly for years, which speaks to how well the basic experience works. Usability strengths:
The free trial process is standard for subscription apps—you provide payment information upfront, explore the content during the trial period, and can cancel before being charged. Most users navigate this successfully, though like any subscription app, you need to remember to cancel if you don't want to continue. Some users report specific issues: occasional login difficulties with Google authentication, confusion about which content is free versus premium for non-subscribers, and rare cases of the app stopping playback during the night. A small number of users mention subscription management confusion, though canceling through the Play Store is typically straightforward with one-click unsubscribe. The splash screen appears when opening the app, which some daily users find repetitive over time. For those who want to jump straight into content, this adds a brief delay, though it's designed to encourage that initial mindful breath. We're rating ease of use 7.0 out of 10. The app is genuinely easy to use for the vast majority of users, with intuitive navigation and simple playback. Minor friction points exist, particularly for free users exploring content boundaries, but don't significantly impact the subscriber experience. | 6.5 Ease of use is perhaps Insight Timer's most polarizing aspect, with experiences varying dramatically between new users and those returning after time away. The app can be genuinely straightforward for daily meditation, but getting to that daily routine involves navigating several obstacles. What makes it easy:
What makes it difficult:
The most common complaint we found echoes across hundreds of reviews: "I just want to meditate, but the app won't let me." Users who haven't opened the app in days or weeks face particularly aggressive re-engagement tactics—mandatory surveys asking about their absence, prompts to set new goals, and multiple screens before reaching the main interface. One user summed it up perfectly: "Used to be a simple timer. Now I need to click through commitments, ads for classes, and questionnaires that impede my meditation every single time." This sentiment appeared repeatedly in our review analysis, especially from longtime users who remember the simpler early versions. For someone using the app daily with established favorites, it functions reasonably well. For anyone else, expect friction. We rate ease of use at 6.5—adequate once you learn to navigate the obstacles, but frustratingly complex for what should be a calming experience. | 9.5 Serenity is remarkably easy to use. This came up repeatedly in reviews and matched our experience—the app just works, immediately, without friction. What makes it so accessible:
Ease of use particularly shines for beginners. Multiple first-time meditators mentioned Serenity helped them establish regular practice when other apps felt overwhelming. One user switching from another "popular meditation app" (likely Headspace) specifically cited Serenity's simpler layout as crucial during anxiety attacks—they could find what they needed quickly without confusion. Even purchasing is straightforward if you choose to upgrade. Buy specific content packs rather than committing to a full subscription. Flexibility and control. Ease of use earns 9.5 out of 10. This is one of the app's greatest strengths. Serenity removes barriers between you and meditation, making it genuinely effortless to build a practice. The 0.5 deduction? Perfection doesn't exist—but this comes close to frictionless usability. Winner in this category |
| Security & Privacy Prod Apps's expert score for the 'Security & Privacy' aspect of each app. | 7.0 Calm handles user data responsibly with standard privacy practices appropriate for a wellness app. The company partners with major employers and insurance providers, which requires meeting enterprise-level security and privacy standards. With 50M+ downloads and partnerships with Fortune 500 companies, Calm maintains professional data protection practices. Security and privacy strengths:
The app collects usage data to track your meditation progress, favorite content, and streaks—standard for any app with personalization features. This data helps improve your experience by remembering preferences and providing personalized recommendations. The privacy policy outlines what data is collected and how it's used. Financial transactions are processed through Google Play Store, which provides an additional layer of security and familiar payment infrastructure. The Play Store handles payment information rather than the app storing it directly, following best practices for subscription apps. For users concerned about mental health data privacy, Calm's meditation and sleep content choices represent personal information. The app's enterprise partnerships and scale suggest they take this responsibility seriously, though as with any wellness app, users should review the privacy policy to understand data handling. Some users report billing questions during trial periods, which is common across subscription apps and typically relates to understanding trial terms rather than security issues. Standard subscription management through the Play Store provides familiar cancellation options for most users. The lack of data breach reports across millions of users and years of operation demonstrates solid security practices. For a wellness app trusted by major corporations, maintaining strong security and privacy standards is essential to business partnerships. We're rating security & privacy 7.0 out of 10. Calm maintains professional privacy practices appropriate for a wellness app with enterprise partnerships, handles user data responsibly, and shows no history of security breaches across millions of users. | 8.0 Insight Timer takes a reasonably solid approach to privacy, though not exceptional compared to privacy-focused alternatives. The app can be used entirely without creating an account, which is excellent for those concerned about data collection. However, most users will eventually create accounts to sync progress and save favorites. Privacy strengths:
Privacy concerns:
The privacy policy is reasonably clear about data collection practices, though it's lengthy and covers the typical bases for a modern app. Your meditation habits, session lengths, and content preferences are tracked and used to improve recommendations. This data isn't sold to third parties, but it is used internally for product development and personalization. Compared to Medito, which achieves higher privacy scores through its nonprofit, open-source model, Insight Timer is more typical of commercial meditation apps. It's better than apps that require accounts immediately, but not as privacy-focused as some alternatives. We rate security and privacy at 8.0—solid practices that respect user data without achieving the highest standards of privacy-focused apps. | 9.5 Serenity takes a privacy-friendly approach that stands out. The biggest advantage is simple: no account required means no personal data collection for basic use. Privacy strengths:
Ads in the free version are the main privacy consideration. Users say they're "seamlessly integrated," and they appear to be standard in-app advertising rather than highly targeted data collection. Still, ads typically involve some tracking—worth noting if you're privacy-conscious. For maximum privacy, Medito sets the gold standard with open-source, ad-free, account-free approach. Serenity's practices are solid though—better than subscription apps requiring accounts and more transparent than many competitors. Security and privacy earn 9.5 out of 10. The no-account approach provides excellent privacy. Ads in the free version are the only minor concern, and even that appears handled reasonably. For most users, Serenity's privacy practices are more than adequate. Winner in this category |
| Conclusion A summary of our findings and final thoughts for each app. | Calm has earned its position as a leading meditation and sleep app with 50M+ downloads, 4.8 stars on iOS, and 4.1 stars on Android. The celebrity-narrated sleep stories are genuinely special—falling asleep to Cillian Murphy, Bob Ross, or Rosé provides a premium experience that justifies the subscription for millions of users. The daily programs, extensive meditation library, and variety of soundscapes create comprehensive value. Long-term subscribers frequently mention Calm becoming essential to their nightly routine, helping with sleep quality and stress management over years of use. The production quality is excellent, the content library is extensive, and the app performs reliably for the vast majority of users. For those whose employers provide Calm subscriptions as a wellness benefit, it's an excellent value proposition. Recent Android reviews show some concerns—the last 100 reviews average 3.04 stars, lower than the overall rating. Some users mention billing confusion during free trials, occasional technical issues, and customer service responsiveness questions. These issues appear to affect a subset of Android users rather than representing the typical experience, but they're worth noting. If you're considering Calm, the free trial lets you explore the content library to see if the sleep stories and meditation programs work for you. The celebrity narrations and production quality differentiate it from competitors. For daily meditation and sleep improvement, Calm delivers substantial value that users rely on over years. Alternative options include Medito for free meditation content with no subscription required, and Headspace for premium content with different stylistic approach. But Calm's unique celebrity content and extensive library make it a strong choice for those committed to meditation and sleep improvement. | Insight Timer presents a fascinating contradiction: it offers arguably the best free meditation content library available while simultaneously frustrating users with an increasingly cluttered experience. The core value proposition remains exceptional—tens of thousands of guided meditations, a flexible timer, and genuine expertise from world-class teachers, all without mandatory subscriptions or advertisements. However, the app's evolution from simple meditation timer to comprehensive wellness platform has introduced friction that works against its core purpose. Forced surveys, commitment prompts, marketing for courses and retreats, and UI complexity detract from what should be a calming, focused experience. The declining Android ratings (3.87 in recent reviews vs. 4.7 overall) tell a clear story: longtime users are frustrated with the direction. Despite these challenges, we found Insight Timer valuable for our daily practice. The content quality and variety are unmatched, and once you establish your favorite teachers and meditations, the app functions well enough. The premium subscription feels optional rather than necessary, which is refreshing in this category. If you're seeking the most polished, distraction-free meditation experience, Calm or Headspace might serve you better despite their subscription requirements. If you want completely free, no-strings-attached meditation with a cleaner interface, Medito is worth considering. But if you value content variety above all else and can tolerate some interface frustrations, Insight Timer delivers exceptional value. Just be prepared to click through a few extra screens to get to your meditation. | Serenity delivers what a meditation app should: effective guidance, reliable performance, and genuine accessibility. The 4.8-star rating with 54.2K reviews isn't inflated—the app works well, the narrator's voice is soothing, and the interface stays out of your way. The rising recent rating (4.95 stars) shows quality improving, not declining. What makes Serenity valuable is a rare combination of factors. The free 7-day beginner course provides real value without requiring an account or payment info. Sleep meditations work effectively for long-term users. Flexible pricing respects your budget—buy what you want instead of committing to a subscription. The app maintains this quality over years without the technical deterioration affecting competitors. It's not perfect. Free content is limited beyond basics, ads are present, and the values-focused approach in some sessions won't appeal to everyone. Want completely free meditation? Medito is your choice. Want celebrity narrators and massive libraries? Calm has that (at subscription cost). Need therapy integration? Headspace provides it (though with current technical issues). For straightforward, effective meditation with excellent beginner support and reasonable pricing, Serenity hits the sweet spot. The simplicity is intentional. The focus on fundamentals over feature bloat helps. The consistent praise for ease of use, voice quality, and sleep effectiveness across thousands of reviews isn't marketing—it's genuine experience. We recommend Serenity for beginners building their first meditation practice, anyone struggling with sleep who wants guided sessions, and users who appreciate simplicity. The free content lets you test it without commitment. If it clicks, flexible purchasing provides fair value. Reliable performance won't get in the way of developing consistent practice. |
| Our Recommendation | |||
