Uno Calculator vs Notesnook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Uno Calculator
This app offers a comprehensive suite of calculation tools, handling everything from basic arithmetic to complex unit conversions. It supports measurements for size, temperature, speed, energy, and currency, making it a versatile solution for diverse needs.
- Arithmetic calculations
- Unit conversions
- Size measurements
- Temperature conversions
- Speed calculations
- Energy calculations
- Currency exchange
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The powerful Uno Calculator receives a makeover from Uno Platform with a wide variety of features. From calculations to measurements of size, temperature, speed, energy, currency and more, the calculator is a powerful one-stop-shop for all calculation-related needs.
Notesnook
This open-source app offers secure, encrypted note-taking and organization across all your devices. It features a robust editor, to-do lists, and a private journal with advanced security to protect your personal information.
- Military-grade encryption
- Cross-platform synchronization
- To-do lists and task management
- Private journal with media support
- Rich text and Markdown editor
- Notebook organization
- App lock with fingerprint support
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Your notes are yours. Notesnook encrypts every one of them on your device before it ever reaches the cloud — so no one can read them. Not advertisers, not us. UNLIMITED NOTES. EVERY DEVICE. FREE. Most note apps cap the free plan until it hurts. Others stop after a few dozen notes. Notesnook never limits how much you write or how many devices you sync. A REAL EDITOR Headings, tables, code blocks, maths, outlines, Markdown and full-quality images. Notes that hold up whether you are writing a shopping list or a thesis chapter. ORGANISED AT ANY SIZE Nested notebooks, tags, colours, pinned and favourite notes, and search that stays instant at 10,000 notes. Link notes to each other and build your own private wiki. PRIVACY YOU CAN CHECK YOURSELF • End-to-end encryption is always on — you cannot switch it off, so you cannot forget • Encrypted on your device, in transit and at rest, using XChaCha20-Poly1305 and Argon2 • Even your notebook and tag names are encrypted • 100% open source under AGPLv3 — read every line, or run your own sync server • Recommended by Privacy Guides IMPORT YOUR OLD NOTES Bring your notes, notebooks and tags with you. Import from your previous notes app, plus plain Markdown and HTML files. EVERYWHERE YOU WRITE iPhone, iPad, Mac and the web. Sync is instant, and encrypted the whole way. ALSO INSIDE • Web clipper — save any article, ad-free and offline • Reminders across all your devices • Note version history, so nothing is ever really lost • Publish a note to a shareable link • Dark mode and custom themes FREE FOREVER Unlimited notes, unlimited devices, 50 notebooks, 50 tags and full end-to-end encryption. No ads. No trial countdown. PAID PLANS Add task lists, callouts, recurring reminders, more storage, and — on Pro — app lock, an encrypted vault and full-quality images. From $19.99 a year. Questions or feedback: support@streetwriters.co Privacy policy: https://notesnook.com/privacy Terms: https://notesnook.com/terms
Screenshots
Verdict
The clearest difference is in-app purchases: Uno Calculator at none against Notesnook's 20. Notesnook's advantage is update cadence (every 8 days vs every 5 months) and ratings volume (672 vs 113). On price, rating, review sentiment and ads 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. Notesnook sells 17 in-app purchases, starting at $0.99 per month. Uno Calculator asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.6 for Uno Calculator against 4.7 for Notesnook. That said, the two scores are not equally well evidenced: Notesnook has 672 ratings behind it against 113, so its average is the more settled of the two. Written reviews are what separate them: 73% of Uno Calculator's written reviews are positive against 79% of Notesnook's.
Uno Calculator ships an update every 5 months, Notesnook every 8 days. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.
| Parameter | Uno Calculator | Notesnook |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (113 ratings) | 4.7 (672 ratings) — better |
| Positive reviews | 73.2% of reviews | 78.8% of reviews — better |
| Number of ratings | 113 | 672 — better |
| Update frequency | Every 5 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 14.2 — better | 15.6 |
| Further details — not scored | ||
| Size | 96 MB | 96 MB |
| Age rating | 4+ | 4+ |
| Developer | Uno Platform Inc. | Streetwriters LLC |
Customer experience
Uno Calculator
Notesnook
User reviews
Uno Calculator
From 113 App Store ratingsWhat we love
- 💰 Completely free with no ads or in-app purchases
- 🎨 Clean, minimalist, and intuitive user interface
- 🔧 Multiple calculator modes (standard, scientific, programmer)
- 📊 Useful unit conversion features
- 📜 Helpful history and memory panes for tracking calculations
Room to improve
- ⌨️ No keyboard input support on Mac or iPad (major recurring complaint)
- 📍 Calculator buttons positioned on left side (inconvenient for right-handed users)
- 📜 History pane cannot be hidden or minimized
- ⏱️ Slower app launch time compared to stock calculator
- 🐢 Laggy performance on macOS with slow button responsiveness
Notesnook
From 672 App Store ratingsWhat we love
- 🚀 Fast and efficient
- 🔒 Secure and private
- 👍 Clean and intuitive UI
- 👍 Cross-platform compatibility
- 👍 Generous free tier
Room to improve
- 🐛 Sync and login issues
- 🐛 Buggy and crashes
- 💰 Expensive premium tier
- 🔒 Lack of free encryption features
Bugs and requests
Uno Calculator
Reported bugs
10 issues- Standard calculator mode doesn't follow order of operations (1+2*3 = 9 instead of 7)
- Buttons disappear while using on iPad
- Apple Pencil input causes buttons to blend into background
- Slow key responsiveness on macOS
- Numeric keypad input not recognized from Apple keyboard
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- History not persisting after app closure
- Text rendering issues on larger iPad displays
- Unit conversion errors (volume translated incorrectly in Chinese)
- Slow data entry on macOS Catalina
- Landscape mode layout issues
Requested features
11 requests- Keyboard input support for Mac and iPad (most requested)
- Copy and paste functionality for results and formulas
- Option to reposition calculator buttons to right side
- Ability to hide or collapse history pane
- Persistent history that saves after app closes
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- Sound/click feedback option in settings
- Donation option within the app
- Improved dark mode styling
- Bluetooth keyboard support
- Numeric keypad support for external keyboards
- Currency conversion feature restoration
Notesnook
Reported bugs
3 issues- Crashes on launch on older iOS devices
- Sync issues leading to data loss
- Unreliable login and verification process
Requested features
5 requests- Improved search functionality
- Reminders and calendar integration
- Handwriting and drawing support
- Multilingual support
- Improved table and spreadsheet features
In-app purchases
Uno Calculator
No in-app purchases
Notesnook
- Notesnook Pro$0.991 Month
- Notesnook Essential Plan7 Days trial$1.991 Month
- Notesnook Pro$2.491 Month
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- Notesnook Pro Plan7 Days trial$2.991 Month
- Notesnook Pro3 variants$4.491 Month
- Notesnook Pro1 Month trial$4.491 Month
- Notesnook Pro Plan7 Days trial$6.991 Month
- Notesnook Believer Plan7 Days trial$8.991 Month
- Notesnook Pro$9.991 Year
- Notesnook Essential Plan14 Days trial$19.991 Year
- Notesnook Pro$24.991 Year
- Notesnook Pro Plan14 Days trial$29.901 Year
- Notesnook Pro Yearly$49.991 Year
- Notesnook Pro2 variants$49.991 Year
- Notesnook Pro1 Year trial$49.991 Year
- Notesnook Pro Plan14 Days trial$69.991 Year
- Notesnook Believer Plan14 Days trial$89.991 Year
