Compare Merlin AI and PaperSpan: Which App is the Best?

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.
A reliable read-it-later app with clean formatting and offline reading. Great for organizing articles by category, though the interface feels dated.
Key Features
  • Multi-AI Integration: Access to ChatGPT, Grok AI, DeepSeek, Gemini, Claude, and Perplexity AI in one app
  • AI Tools Suite: PDF summarizer, image generator, YouTube video summarizer, and language translation
  • Platform Integration: Works with Gmail, Google Search, and LinkedIn for enhanced productivity
  • Cross-Device Sync: Seamless experience across Android, desktop, and other platforms
  • Generous Free Plan: 102 queries per day with access to all major AI models
  • Voice Chat: Premium voice-powered chat capabilities for hands-free interaction
  • Clean Reading Experience – Articles displayed in distraction-free format
  • Offline Reading – Access saved articles without internet connection
  • Audio Playback – Listen to articles with text-to-speech feature
  • Smart Organization – Auto-categorization and folder management
  • Cross-Platform Sync – Save from desktop, read on mobile devices
  • Kindle Integration – Send articles directly to Kindle devices
Our Rating
8.3
7.2
Total users
0
0
Total ratings
0
0
Average rating
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Entry Level PriceFreeFree
Android
Google Play Store
Downloads
Google Play Store
Downloads
iOS
Apple App Store
Apple App Store
Features
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:

  • PDF summarizer
  • YouTube video summarizer
  • Image generator
  • Language translation
  • Email composition with Gmail integration

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.

7.3

PaperSpan is pretty good at the basic stuff. It takes messy web articles and makes them actually readable, which is honestly the main thing you want from an app like this. No ads, no random pop-ups, just clean text that's easy on the eyes.

  • Saving Articles: Click one button and it's saved. The app even sorts them into categories automatically, which actually works most of the time.
  • Clean Reading: Articles look way better in the app than on the original websites. No clutter, just the content.
  • Offline Reading: Download stuff to read on the subway or plane. Really handy when your internet is spotty.
  • Listen to Articles: The text-to-speech thing is useful if you want to "read" while doing dishes or whatever.
  • Works Everywhere: Save on your computer, read on your phone. It syncs pretty well most of the time.
  • Kindle Thing: You can send articles to your Kindle, which is nice if you prefer reading on e-ink.

The annoying part is that sometimes the text gets cut off halfway through an article, so you have to switch to the web view to finish reading. Also, the search could be better. It's a solid app for basic use, but if you want fancy features, you might be disappointed. We'd give it 7.3 out of 10.

Performance
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.

6.9

Performance is PaperSpan's biggest weakness. When everything works correctly, the app is fast and responsive. Article saving is quick, reading is smooth, and offline functionality is excellent. The problem is consistency—too many things go wrong too often.

The most common issues we encountered include sync problems between devices, network connectivity failures during signup, and the frustrating text view cutoff that interrupts reading sessions. The discontinued Chrome extension also limits desktop integration significantly.

These aren't dealbreaking problems, but they add up to an inconsistent user experience. The positive news is that recent ratings have improved significantly (4.13/5 for the last 100 reviews compared to 3.8/5 overall), indicating the developers are actively addressing these issues. Performance score: 6.9/10.

Design
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.

6.2

PaperSpan's design prioritizes function over form, which works well for the reading experience but falls short everywhere else. The article reader itself is excellent—clean typography, perfect spacing, and smart image handling make reading genuinely enjoyable.

  • Reading Interface: Distraction-free design that puts your content front and center.
  • Article Formatting: Excellent text sizing and spacing that's comfortable for extended reading sessions.
  • Navigation: Simple menu structure that anyone can understand immediately.

The problem is everything outside the reading experience. The overall interface looks and feels outdated compared to modern apps. Multiple users mentioned this in reviews, and we completely agree—PaperSpan desperately needs a visual refresh. The functionality is solid, but the dated appearance undermines the user experience. Design score: 6.2/10.

Value for Money
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.

8.1

This is where PaperSpan absolutely excels. The free version is genuinely useful—not a crippled demo designed to force you into paying. You get article saving, clean reading, offline access, and basic organization without any artificial restrictions. It's refreshingly honest in a world of manipulative freemium models.

The premium subscription at €10.99 monthly unlocks audio playback, enhanced search, Kindle integration, and improved syncing. For heavy readers who use these features daily, it's reasonably priced. Casual users will find the free version more than sufficient for their needs.

What impressed us most was user feedback describing PaperSpan as "the only read later app providing all the features for free." While not entirely accurate, it speaks to how generous the free tier feels. The pricing is fair and transparent—no hidden costs or misleading trials. Value for money score: 8.1/10.

Ease of Use
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.

7.8

PaperSpan gets this right from the first minute. The app is genuinely intuitive—no complex setup, no overwhelming feature lists, just straightforward functionality that works exactly as you'd expect. Within minutes of downloading, you're saving and reading articles effortlessly.

The basics are seamless. Save articles with one click from your browser, and the automatic categorization handles organization without any input from you. Reading controls are exactly where you'd expect them, and switching between text and web view is instant when needed.

We did encounter some frustrating technical issues. Network connectivity problems during signup affect multiple users, and we experienced sync delays between devices. The text cutoff issue can be annoying mid-article. These problems don't break the app, but they create unnecessary friction in what should be a smooth experience. Ease of use score: 7.8/10.

Security & Privacy
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.

6.8

Security and privacy aren't PaperSpan's strongest selling points, mainly because there's limited transparency about how your data is handled. The app stores your reading data on their servers for syncing across devices, which is standard practice but means your reading habits and saved articles aren't kept locally.

What concerned us most was the lack of detailed privacy documentation. For an app that handles your reading preferences, article URLs, and potentially sensitive saved content, clearer communication about data protection would be reassuring. We didn't encounter obvious security problems during testing, but the transparency gap is noticeable.

Most users probably won't find this problematic for everyday use, but privacy-conscious readers might want to dig deeper into the terms of service or consider alternatives with more transparent data practices. Security and privacy gets 6.8 out of 10.

Conclusion
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.

After using PaperSpan for a while, we'd actually recommend it to most people. Yeah, it looks a bit old and has some annoying bugs, but it does the main job really well. If you commute a lot or just want to actually read those articles you save instead of letting them pile up forever, this app helps. It's not fancy, but it works, and sometimes that's exactly what you need.

Our Recommendation