Compare Serenity and Cool VPN Pro: Which App is the Best?
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. | Cool VPN Pro offers budget-friendly VPN access with thousands of servers, but recent reliability issues and a declining rating (3.86 in last 100 reviews vs 4.8 overall) raise concerns about connection stability and service quality. | |
| 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. | 9.0 Winner in this category | 5.8 |
| Total users Total active users across all major browsers: Chrome, Edge, Firefox, and Safari. | 0 | 0 |
| Total ratings Total number of user ratings received across all supported browsers. | 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 |
| Android User rating and stats for the app on Android browser. |  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. | 8.5 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. Winner in this category | 7.0 Cool VPN Pro offers a respectable feature set that covers the essentials of VPN functionality. The app advertises thousands of servers across multiple countries, which is competitive for this price range. The ability to automatically connect based on network type (Wi-Fi or cellular) adds convenience for users who want constant protection. The app-specific VPN routing stands out, letting you choose which applications use the VPN connection while others access the internet directly. This flexibility proves useful when you need VPN protection for specific apps but want normal speeds for others. The one-tap connection interface makes getting online quick—when it works properly. The feature set feels somewhat basic compared to premium competitors. Split-tunneling for websites is absent, server information is limited, and the selection process lacks granularity. Detailed connection statistics and advanced security options that power users expect are missing. The promised "unparalleled VPN performance" in the app description doesn't match what users actually experience. The core VPN features are present, but execution has become inconsistent. Advertised features like "one-tap connection" now frequently result in extended "network optimization" screens that never resolve. Reliability is a feature in itself for VPN apps, and Cool VPN Pro's recent struggles here significantly impact the overall rating. |
| Performance Prod Apps's expert score for the 'Performance' aspect of each app. | 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 | 4.5 Performance is where Cool VPN Pro's current struggles become most apparent. The app's overall 4.8-star rating tells one story, but the recent 3.86-star average from the last 100 reviews tells another. This significant drop reflects widespread performance issues that have emerged recently. Connection reliability is the primary concern. Numerous recent reviews report that the app gets stuck on "network optimization" screens and fails to establish connections. Some users mention waiting 10 minutes or more for connections that never complete. Others report that the app simply "doesn't work" at all, despite previously functioning normally. This inconsistency is particularly problematic for a VPN service where reliability is paramount. When connections do establish, speed performance is mixed. Some users report adequate speeds for browsing and streaming, with one reviewer praising "blazing fast, unlimited speed." However, an equal number complain about extremely slow connections—one user described speeds of "3 kbit per second," which is essentially unusable. This wide variance suggests inconsistent server quality or capacity issues. The app's stability has also deteriorated. Multiple reviews mention increased crashes, freezing, and unexpected disconnections. Battery drain is mentioned by several users, suggesting the app may not be efficiently managing system resources. The long loading times and "optimization progress not ended" errors indicate potential server-side or network infrastructure problems that the developers haven't adequately addressed. Server availability appears inconsistent as well, with some users reporting that "all servers are down" during their attempts to connect. While it works reliably for some users (particularly those in certain regions like Iran and Myanmar where it remains popular), the overall performance trajectory is concerning. For a VPN service at any price point, the level of connection failures and performance issues we've documented is difficult to justify. |
| Design Prod Apps's expert score for the 'Design' aspect of each app. | 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 | 6.5 The design of Cool VPN Pro follows a fairly standard VPN app layout with a prominent connection button as the centerpiece. The interface is straightforward with minimal distractions, which makes it approachable for users who aren't technically savvy. The color scheme is simple, and the main connection status is clearly visible. Navigation between servers and settings is uncomplicated, with most options accessible within a few taps. The server list is organized by country with flags for easy identification, and connection status indicators use familiar colors (red for disconnected, green for connected). This conventional approach works well enough for basic functionality. However, the design feels dated compared to modern VPN apps like NordVPN or ExpressVPN, which have invested heavily in polished, intuitive interfaces. The visual hierarchy could be improved, and some screens feel cluttered with promotional content for premium features. The design lacks the sophistication and attention to detail that makes premium apps feel premium. The biggest design issue is the intrusive advertisement placement in the free version. Multiple users complain about ads appearing at inconvenient moments, disrupting the user experience. While monetization through ads is understandable, the implementation here feels aggressive and detracts from the overall design quality. |
| Value for Money Prod Apps's expert score for the 'Value for Money' aspect of each app. | 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. Winner in this category | 5.0 Cool VPN Pro's value proposition is complicated. The free tier exists, which technically makes it accessible to anyone, but the ad-heavy experience and limited server access mean you're getting what you pay for—or less. Based on user feedback, the free version has become increasingly restricted and difficult to use without constant ad interruptions. The premium pricing (€2.69 to €104.99) sits below what you'd pay for premium services like ExpressVPN, making it appear competitive. However, value isn't just about the price—it's about what you receive for that price. With Cool VPN Pro's declining reliability and increasing connection issues, the question becomes whether saving a few euros monthly is worth the frustration of a VPN that doesn't consistently work. Users who subscribed when the service was more reliable express disappointment with recent performance degradation. Several reviews mention that "it was wonderful when it was free" or that the service has declined since they first started using it. This suggests that the value equation has shifted negatively over time, with the company perhaps struggling to maintain service quality as it scales. Compared to Brave Private Browser's integrated VPN features or even AVG Secure VPN's straightforward offering, Cool VPN Pro doesn't clearly differentiate itself on value. The extensive advertisements, reliability issues, and lack of transparency about server quality make it difficult to recommend as a strong value option, even at its lower price point. If you need a VPN that consistently works, spending a bit more on a proven service might ultimately provide better value. |
| Ease of Use Prod Apps's expert score for the 'Ease of Use' aspect of each app. | 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 | 6.0 When Cool VPN Pro works as intended, it's reasonably easy to use. The basic concept is simple: open the app, tap the connect button, and you're protected. For users who just want to bypass regional restrictions without diving into technical settings, the straightforward approach has merit. First-time users can get connected without reading documentation or watching tutorials. The app provides some helpful automation features, like the option to auto-connect when joining specific networks. Setting these up is relatively intuitive, and they work reliably once configured. Server switching is straightforward, with a simple list interface that lets you select your desired location quickly. However, ease of use breaks down when things don't work smoothly. A significant number of recent reviews mention getting stuck on loading screens, particularly the "network optimization" phase. When connection attempts fail, error messages are often vague and don't provide actionable solutions. This creates frustration, especially for less technical users who don't know how to troubleshoot VPN connection issues. The free version's ad interruptions also impact usability. Users report that ads appear when trying to connect or switch servers, adding friction to what should be a seamless process. Additionally, the distinction between free and premium features isn't always clear upfront, leading to confusion when certain servers or options are locked behind the paywall. |
| Security & Privacy Prod Apps's expert score for the 'Security & Privacy' aspect of each app. | 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 | 5.5 Cool VPN Pro claims a no-logs policy, stating it doesn't track or keep logs of user activities. The app advertises a "high safe encryption algorithm" for securing connections on public Wi-Fi. These are standard VPN privacy claims, but the lack of transparency about specific encryption protocols raises concerns. Unlike premium VPN services that undergo independent security audits and publish detailed transparency reports, Cool VPN Pro provides limited information about its security practices. The privacy policy exists but isn't as comprehensive or clear as what you'd find with established providers like NordVPN or ExpressVPN. There's no mention of independent audits or third-party verification of their no-logs claims. The app requires various permissions, which is normal for VPN functionality, but the privacy implications of the extensive ad network integration in the free version aren't clearly disclosed. When you're using a VPN partly for privacy, having multiple advertising SDKs tracking your behavior creates an inherent contradiction. Premium subscribers avoid this issue, but free users should be aware of the trade-off. The company is registered in Singapore (HOPE DEVE PTE. LTD.), which has reasonable data protection laws, but it's not in a jurisdiction known for strong privacy protections like Switzerland or Iceland. The lack of clear information about server ownership (owned vs. rented) and data handling practices makes it difficult to fully assess the privacy posture. For users primarily concerned with bypassing geo-restrictions rather than maximum privacy, these concerns may be less critical. |
| Conclusion A summary of our findings and final thoughts for each app. | 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. | Cool VPN Pro finds itself at a crossroads. While it has built a substantial user base of over 10 million downloads and maintains a historically strong 4.8-star rating, the recent performance decline tells a different story. The sharp drop to 3.86 stars in the most recent 100 reviews reflects growing frustration with connection failures, excessive advertisements, and reliability issues that have emerged over time. For users primarily seeking to bypass internet restrictions in regions with heavy censorship, Cool VPN Pro still serves a purpose, particularly given its lower price point and accessibility through a free tier. The app works adequately for some users, especially those who successfully connect and maintain stable sessions. However, the inconsistent performance makes it difficult to recommend with confidence. The core issue is reliability. A VPN needs to work when you need it, and Cool VPN Pro increasingly fails this fundamental test. The frequent connection failures, long optimization delays, and server availability problems create an unpredictable experience. When you're paying for a service—even a budget one—you should expect consistent functionality. If you're considering Cool VPN Pro, we'd recommend exploring more established alternatives first. NordVPN and ExpressVPN cost more but deliver significantly better reliability and performance. Brave Private Browser offers integrated VPN features with better transparency, while AVG Secure VPN provides a straightforward, reliable option without the connection issues. The money saved on Cool VPN Pro's lower pricing may end up costing you more in time and frustration dealing with a service that doesn't consistently deliver on its promises. |
| Our Recommendation | ||
