Compare HabitKit and Merlin AI: Which App is the Best?
HabitKit is a beautifully designed habit tracking app that helps you form new habits with tile-based grid charts. It's privacy-focused, easy to use, and perfect for tracking daily, weekly, or monthly habits. | Merlin AI combines ChatGPT, Grok AI, DeepSeek, Gemini, Claude, and Perplexity AI in one powerful app with 70+ AI tools. Enjoy 102 free daily queries and seamless cross-platform integration. | |
| 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. | 9.3 Winner in this category | 8.3 |
| 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 HabitKit delivers a solid set of core habit tracking features, focusing on simplicity and effectiveness. The standout is the GitHub-style heatmap, which makes tracking your progress both motivating and visually satisfying. Key features we found especially useful include:
There are some limitations: the free version restricts you to 4 habits, which may not be enough for everyone, and there's no way to organize habits into categories or folders. Widgets are visually appealing but don't allow direct interaction. Still, the features that are present are thoughtfully implemented and work reliably. We rate features at 8.5—excellent for core functionality, but with room for more organizational tools. | 9.0 Merlin AI has everything you'd want in an AI assistant. It brings together seven different AI models - ChatGPT, Grok AI, DeepSeek, Gemini, Claude, and Perplexity AI - all in one place. This means you don't need separate subscriptions for each one. We really liked the 70+ AI tools it comes with:
The best part is how easy it is to switch between different AI models - just one tap and you're using a different AI. Plus, everything syncs across your devices so you can start a conversation on your phone and continue it on your computer. Winner in this category |
| Performance Prod Apps's expert score for the 'Performance' aspect of each app. | 9.2 HabitKit performs exceptionally well in day-to-day use. The app is lightweight, launches quickly, and all interactions—such as marking completions, navigating between views, and customizing habits—are smooth and responsive. Animations are fluid and add to the overall polished feel of the app without causing any lag. We encountered very few bugs or crashes, and the app remained stable even when tracking a large number of habits (in the premium version). User reviews echo this experience, with most people praising the app's reliability and speed. A handful of users mentioned minor issues with widgets, such as sizing or display quirks on certain devices, but these did not affect the core functionality and were often addressed in updates. Overall, HabitKit delivers a consistently fast and stable experience, both in our hands-on testing and according to the majority of user feedback. We rate its performance at 9.2 out of 10. Winner in this category | 8.0 The app runs smoothly without lag or interruptions when chatting with multiple AI models. The search function works quickly and accurately, so you can easily find your conversations. We tested it on different devices and platforms, and it performed well everywhere. The chat responses are fast, even when switching between different AI models. The cross-device sync works reliably, so you can start a conversation on your phone and pick it up later on your computer. The integration with Gmail and LinkedIn works well without delays. We did notice some occasional loading times when processing complex requests or large documents, but overall the performance is consistent and reliable for everyday use. The best part is that basic features work offline, so you can access your conversations even without an internet connection. |
| Design Prod Apps's expert score for the 'Design' aspect of each app. | 9.5 HabitKit's design is one of its greatest strengths. The minimalist aesthetic strikes a perfect balance between beauty and usability. The GitHub-inspired tile grid is not only visually appealing but also serves as a powerful motivational tool—watching your chosen colors fill the grid is genuinely satisfying. We especially liked:
Animations are smooth and purposeful, and the typography is clear and readable. While the minimalist approach may feel sparse to some, especially when managing many habits, we found it refreshing and effective. We rate design at 9.5. Winner in this category | 8.0 The app looks clean and modern. It's easy to find what you need without getting lost in menus. The chat interface is well-designed with clear differences between responses from different AI models. We liked how the app works the same way whether you're on Android, iOS, or desktop. It adapts nicely to different screen sizes. The dark and light theme options are a nice touch, and you can customize the interface to your liking. The mobile version works really well too - you can easily access your AI conversations on your phone without any issues. |
| Value for Money Prod Apps's expert score for the 'Value for Money' aspect of each app. | 9.5 HabitKit offers a strong value proposition, especially when compared to other habit trackers. The free version is genuinely useful for those with minimal needs, providing all core tracking features and a beautiful, ad-free experience. However, it does limit you to tracking just 4 habits, which several users found restrictive if you want to monitor more aspects of your life. Upgrading to premium unlocks unlimited habits, widgets, advanced analytics, and data backup/export. Pricing is fair and transparent, with options for a monthly, yearly, or one-time lifetime purchase. Many users appreciate the availability of a lifetime license, which is rare among productivity apps and offers excellent long-term value. The premium features are genuinely useful and not just cosmetic add-ons. We also liked that there are no hidden costs, no ads, and no data collection, which adds to the sense of getting good value for your money. While some users wished the free version allowed tracking a few more habits, most agreed that the premium upgrade is worth it if the app fits your workflow. Overall, HabitKit delivers a high-quality experience at a reasonable price, and we rate its value for money at 9.5 out of 10. Winner in this category | 9.0 Merlin AI offers great value. You can use it for free without creating an account, and you get 102 queries per day across all the major AI models. This free access to ChatGPT, Grok AI, DeepSeek, Gemini, Claude, and Perplexity AI in one app saves you from needing multiple expensive subscriptions. The premium plan adds useful features like voice chat, advanced AI tools, and team collaboration. The pricing is reasonable, making it a good choice for students, professionals, and anyone who wants to boost their productivity. When we compared it to individual subscriptions for these AI services, Merlin AI saves you money while offering more convenience. You really can't find another tool that gives you this much value for so little cost. |
| Ease of Use Prod Apps's expert score for the 'Ease of Use' aspect of each app. | 9.5 HabitKit is remarkably intuitive and user-friendly. The "less is more" philosophy makes it easy to get started and maintain your habits without confusion or clutter. Highlights include:
The only minor quirk is that reordering habits requires a long-press, which isn't immediately obvious to new users. Once learned, it's easy to use. We rate ease of use at 9.5. Winner in this category | 9.0 Merlin AI is one of the easiest AI assistants we've tried. You can start using it right away without any complicated setup. The free tier gives you 102 queries per day, which is plenty to test everything out. Installing it is simple, and it works great on both Android and iOS. Switching between AI models is super easy - just tap to change from ChatGPT to Grok AI to Claude, and so on. The integration with Gmail and LinkedIn works smoothly. You don't need to configure anything complicated. The free tier lets you explore all the features without committing to anything, which makes it easy to learn at your own pace. We give it a 9 out of 10 because it's really user-friendly, though some of the more advanced features might take a bit of time to figure out. |
| Security & Privacy Prod Apps's expert score for the 'Security & Privacy' aspect of each app. | 9.8 HabitKit stands out for its privacy-first approach. All data is stored locally on your device, with no account required and no remote servers involved. The app works fully offline, so there's no risk of data interception, and you can export your data manually whenever you wish. We found no evidence of third-party analytics or tracking tools. The app only requests essential permissions, such as notifications for reminders. This commitment to privacy is rare and highly appreciated. The only small drawback is that backups are manual, so you'll need to remember to export your data regularly. We rate security and privacy at 9.8. Winner in this category | 7.0 For security and privacy, we give Merlin AI a 7 out of 10. The app uses standard encryption for your conversations and personal data, which is good. However, since it connects to multiple AI providers, your data might be shared with these third-party services. This is mentioned in their privacy policy, but it's something to be aware of. The app doesn't ask for unnecessary permissions, but remember that your conversations and any documents you upload are processed by external AI services. While the company is transparent about how they use data, we would have liked more control over what gets shared with which AI providers. They do a good job of being upfront about it, but some users might want more control over their data. |
| Conclusion A summary of our findings and final thoughts for each app. | HabitKit has proven itself to be a standout habit tracking app that truly delivers on its promises. Its greatest strength lies in its simplicity and focus—it does one thing exceptionally well, rather than trying to be everything for everyone. The app's beautiful design, intuitive interface, and strong privacy focus make it a compelling choice for anyone serious about building better habits. While the free version's 4-habit limit may be restrictive for some, the premium upgrade offers excellent value for those who need more comprehensive tracking. We especially appreciate the developer's commitment to privacy and the option for a lifetime purchase, rather than forcing users into a subscription. Regular updates and responsive support suggest this is an app that will continue to improve over time. If you're looking for a clean, efficient, and privacy-focused way to track your habits, HabitKit is an excellent choice that we can confidently recommend. | Merlin AI stands out as an exceptional all-in-one AI assistant that successfully combines multiple AI models with practical tools. The generous free tier makes it accessible to everyone, while the premium features offer significant value for power users. For anyone looking to consolidate their AI tools into one powerful platform, Merlin AI delivers an impressive and well-rounded experience. |
| Our Recommendation | ||
