Nothing X vs Mark Bookmark
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Nothing X
Manage your smart devices with this comprehensive platform. Connect, customize, and monitor your smartwatches and earbuds. Track your health and fitness data in real-time for a healthier lifestyle.
- Quick pairing with smartwatches and earbuds
- Seamless device connection and management
- Personalized function customization
- Real-time health monitoring (sleep, heart rate, blood oxygen)
- Fitness tracking (routes, steps, heart rate)
- Syncs data to Apple Health
Read full descriptionHide full description
Nothing X - Your All-in-One Smart Device Manager Nothing X is a professional smart device control and management platform. It supports quick pairing with its smart watches and earbuds, enabling seamless device connection and efficient management. Device Management - Connect and manage Nothing X smart watches and earbuds, easily controlling all device functions. Personalized Customization - Support for customizing functions on watches and earbuds based on personal usage habits, creating a unique user experience. Health Monitoring - Real-time detection of health data such as sleep quality, heart rate, and blood oxygen. Multi-dimensional tracking of health status provides reference for a healthier lifestyle. Fitness Tracking - Real-time recording of daily activities and fitness data, including running routes, heart rate, and step frequency—all fitness metrics are clearly visible. 【Tips】 - This app supports syncing data to Apple Health, where you can view your health data. - GPS is used for recording running routes and updating watch weather; GPS remains active when the app runs in the background during workouts. - Device functions depend on hardware; detected data is for reference only and not intended for medical diagnosis. 【Contact Us】 If you encounter any issues or have suggestions while using the product, you can submit them by going to "My - Help & Feedback" in Nothing X, or by visiting the link: https://nothing.tech/pages/contact-support.
Mark Bookmark
Capture physical notes and ideas from books and printouts, turning them into organized insights. Automatically catalog your reading and search for specific passages. Chat with your highlights to trace ideas across different sources.
- Scan and save passages with high accuracy
- Record voice notes without unlocking device
- Automatic cataloging by book ISBN
- Searchable library of captured content
- AI chat with highlights and annotations
- Integrations with Notion and Readwise
- Offline capture and sync
Read full descriptionHide full description
Mark II is a smart bookmark that captures your physical notes and ideas, and turns it into organized insights for you to revisit later CAPTURE WITHOUT LEAVING THE PAGE Scan a passage and it's saved, at 99% text accuracy, with any missing letters or words reconstructed automatically. Or hold to record a voice note instead. No unlocking your phone, no typing, no losing the thread of the chapter. It works across your whole reading life — hardcovers, paperbacks, printouts, research papers, Kindle, iPad, and handwriting (beta). 30+ languages. A LIBRARY THAT BUILDS ITSELF Scan a book's ISBN once (beta) and everything you capture from then on files itself under the right title. No folders to design, no tags to maintain, nothing named twice. Over months, it becomes a catalogue of what you've actually read — not a system you have to keep feeding. FIND THE QUOTE YOU HALF-REMEMBER Search for a fragment and get the passage back with its source. Filter by topic, theme, or the moment you captured it. Copy it straight into whatever you're writing. TALK TO WHAT YOU'VE READ Chat with your own highlights and annotations. Trace an idea across different books. Ask about the thing you know you read but can't place. Mark AI answers from what you've captured and nothing else — it won't invent a passage, and it won't summarize a book you never opened. FITS THE SYSTEM YOU ALREADY HAVE Integrations with Readwise, Notion, and many more apps to come. Mark isn't asking you to move in. It's asking you to feed what you've already built. WORKS WHEREVER YOU READ Bluetooth only — pairs like AirPods. Captures save on the device when you're out of range and sync the moment you're back. A single USB-C charge lasts about a week of heavy reading. YOUR NOTES, HELD CAREFULLY Highlights and voice notes are encrypted and stored on AWS in North America. We don't hold personally identifiable information alongside your library, and you can request deletion of your data at any time. WHO IT'S FOR Students who annotate. Researchers who cite. Readers who underline in pencil and mean it. Anyone who has closed a book and been unable to say what was in it. WHAT'S FREE Downloading Mark is free, and so is everything core: highlighting, audio capture, auto-organization, and basic AI chat. An optional subscription unlocks the heavier AI features and advanced integrations. REQUIREMENTS The Mark II device is required for scanning and voice capture. Each device pairs to one account at a time. iOS only. Support: Support@mark.engineering Privacy Policy: thinkwithmark.com/policies/privacy-policy
Screenshots
Verdict
The clearest difference is review sentiment: Mark Bookmark at 100% against Nothing X's 72%. Mark Bookmark also leads on rating (5.0 vs 4.7) and update cadence (every 4 days vs fortnightly). Nothing X's advantage is ratings volume (3.4K vs 2) and iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Mark Bookmark holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Nothing X has 3.4K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 72% of Nothing X's written reviews are positive against 100% of Mark Bookmark's.
Nothing X ships an update fortnightly, Mark Bookmark every 4 days. Both last shipped on October 25, 2026.
| Parameter | Nothing X | Mark Bookmark |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3.4K ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 72.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3.4K — better | 2 |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 354 MB | 121 MB |
| Age rating | 4+ | 4+ |
| Developer | Nothing Technology Limited | Mark Inc |
Customer experience
Nothing X
Mark Bookmark
Bugs and requests
Nothing X
Reported bugs
4 issues- Right earbud randomly stops working
- App fails to connect to earbuds
- EQ settings reset unexpectedly
- Noise cancellation turns on/off randomly
Requested features
5 requests- More granular EQ controls
- Ability to disable all touch controls
- Home screen widget for battery levels
- Integration with voice assistants
- Improved wind noise reduction
Mark Bookmark
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Nothing X
No in-app purchases
Mark Bookmark
No in-app purchases









