# Twelve O'clock — user reviews > 123 indexed App Store user reviews of Twelve O'clock by Hieu Pham, rated 4.40/5 from 82 ratings. - Source: https://appshunter.io/ios/app/twelve-oclock/id1570977980/reviews - App overview in markdown: https://appshunter.io/ios/app/twelve-oclock/id1570977980.md - Rating breakdown: 5★ 64 · 4★ 5 · 3★ 1 · 2★ 4 · 1★ 8 ## What do users think of Twelve O'clock? Overall sentiment: positive **Pros** - 👍 Intuitive and simple user interface - 💰 Excellent value at $0.99 one-time purchase - 🎯 Accurate watch accuracy tracking - ⏱️ Flexible checkpoint timing (0, 15, 30, 45 seconds) - 📊 Clear data visualization and graphs - 🌙 Dark mode support - 📱 Clean, modern design - 🔧 No ads or subscriptions - ⌚ Perfect for mechanical watch enthusiasts - 📈 Tracks multiple watches easily - 💾 Data export functionality - 🎨 Aesthetically pleasing interface - 👨‍💻 Developer actively maintains and updates app - 📚 Curated watch articles included - 🎥 Photo checkpoint feature **Cons** - 🐛 App freezes and crashes frequently - 💾 Data loss after updates - ⚠️ Free version severely limited (5 checkpoints only) - 🔔 Silent mode prevents beeping sounds - 🎯 Requires learning curve for some users - 📱 Buttons too small (15/30/45 second marks) - 🔄 No cloud sync or iCloud backup - 📊 Graph display occasionally glitches - 🔧 Insufficient user instructions - ❌ Cannot edit individual checkpoints without deleting all - ⏰ Removed real-time current time display in recent update - 🌍 Limited language support **Commonly reported bugs** - App freezes at loading requiring phone restart - Data deletion after app updates - Data loss on app crash - Graph display glitches after checkpoints - Photo checkpoint feature returns 'old photo not supported' error - Beeping only works when phone not in silent mode - Sort function not working - Screenshot sharing produces blank page - Calculation errors showing ~150 second variance - Checkpoint history doesn't display correctly - Swiping left to delete checkpoints not intuitive **Most requested features** - iCloud/cloud synchronization across devices - Notifications or reminders for checkpoints - Current time button on checkpoint screen - Larger buttons for 15/30/45 second marks - Power reserve tracking - Wear frequency tracking - Average accuracy by watch position - Widget support - Atomic clock built into app - Regulator clock layout for time setting - In-app feedback option (instead of Twitter) - Automatic time reading from watch photos - 12-hour time format option - Sort function improvements - Year display in checkpoint history - Chrono24 account integration - Regular article updates - Export to Excel/CSV ## Newest reviews (17 of 123) ### 5/5 — Muy bien *2025-08-02, version 3.2.1* La verdad funciona muy bien ### 5/5 — Does what it says on the box *2025-07-02, version 3.2.1* Super reasonable price, solves a very relevant problem, and very clean design that’s easy to use. This is what all mobile apps should strive to be. ### 5/5 — Perfectly simple *2025-04-27, version 3.0.2* Does exactly what I wanted, simple accuracy tracking. Nice to have choice of every 15s to set it so you don’t have to wait. Flawless. ### 5/5 — Delightful App *2025-04-27, version 3.0.2* Elegant and thoughtful way to track your watch collection ### 5/5 — Watch collection in an app *2025-04-03, version 3.0.0* Very well designed watch accuracy app. Only takes a few seconds to log your watch's accuracy. I've tried a bunch of watch apps and this is by far the most aesthetically pleasing and intuitive - it's a great way to log your collection too. Dark mode, clean UI, ability to show time difference by average. It's very well thought out and seems to be developed by a true watch hobbyist. My only request would be to add the current time back to the checkpoint screen. I often set a watch and create a new basepoint immediately after With version 3, I have to switch between tabs now. Thank you for all the great work. ### 5/5 — Awesome app for hobbyists *2025-04-01, version 3.0.0* Tracking the accuracy of my watches is so much fun with this app! Also a great wear to pick which watch from my collection to wear next. Totally worth paying for the “full” version. ### 5/5 — Loving it! *2025-03-31, version 3.0.0* I as wondering if you were going to come back to this thing! Been using for awhile and it is great! Any update on possible widgets/cloud sync? ### 5/5 — Great Alternative to Check Accuracy *2025-03-21, version 2.4.1* This app is a great alternative to a timegrapher for checking a watch’s accuracy. Highly recommend it. ### 5/5 — Works well, and very inexpensive. *2025-03-17, version 2.4.1* Works well, and very inexpensive. ### 5/5 — Just plain fun and simple *2025-02-20, version 2.4.1* Accurate way of gauging your watch’s Actual Rate rather than Instant Rate. Timegraphers are fantastic tools for quick and dirty estimations of a watch’s accuracy. This app gets you real world data without having to do the math. Very impressive. Buy the full version, you won’t be disappointed. ### 5/5 — Fun! *2025-01-15, version 2.4.1* Such a neat way to enjoy your watches. It’s so cool to see the differences in movement performance and how positioning and wear affect accuracy. Only gripe is the sort function doesn’t work for me. ### 5/5 — Very well done. *2025-01-08, version 2.4.1* Has a lot of features and functionality with a simple and easy to understand UI. I don’t know what extra functionality was unlocked by the (small) one time payment as I bought it as soon as the basic functionality looked compelling. Can’t argue with the price of INR 99/- ### 5/5 — Perfect App *2024-12-30, version 2.4.1* Great, no nonsense app - just what I was after. I paid for the full version even though I didn’t need it because I feel the developer deserves it. And for only 99p to upgrade it’s very reasonable. ### 5/5 — Excellent! *2024-12-11, version 2.4.1* Dear Mr Hieu You have created an easy to use and tremendously helpful app which I use when regulating my watches. It would be fantastic if you could consider saving the data to icloud, allowing users to synchronise data on both iPhone and iPad to make measurements, as well as keeping data backed up safely. Best regards. Added, August’24 As an enhancement request: I find the additional 15, 30, and 45 second timers useful but too small - it’s a bit hit or miss when I attempt to use these as my finger often misses them because I’m staring at my watch dial in an attempt to press the app button at precisely the right time. Could these buttons be made to be twice their current height? There’s loads of screen area available. Thanks for considering! ### 5/5 — Worth the pittance of a fee *2024-11-03, version 2.4.1* There is no better AppStore program for measuring watch accuracy. There are others just as good, but more expensive. The only downside is the free version is basically just a trial version, but for less than a cup of coffe's worth you get all the features. ### 5/5 — Great app *2024-10-31, version 2.4.1* Fun and easy way to track the accuracy of your watches. Not as accurate as using timegrapher but then we are talking about mechanical watches here anyways. ### 5/5 — Perfecto relojes automáticos *2024-10-11, version 2.4.1* Soy coleccionista de relojes, sobre todo mecánicos y automáticos, imprescindible, y muy precisa. Gracias. ## Most critical reviews (10 lowest-rated) ### 1/5 — Чушь *2025-10-21* Это приложение не оценивает точность часов, это приложение оценивает скорость реакции владельца и выманивает деньги. **Developer response:** hey! If you don’t trust your shaking finger, use the Photo checkpoint feature instead. Speaking of money: am I swindlering your precious 1 dollar? Or 1 dollar is everything you have? I gave you 5 checkpoints for free. And you can delete them to test over again. Think before you write. ### 1/5 — Disappointing *2025-10-14, version 3.3.0* WARNING: Despite paying for premium, this app does not allow you to remove or edit checkpoints without deleting ALL of them, making it completely useless. ### 1/5 — Only five checks *2025-01-30, version 2.4.1* You can only add five checkpoints and one wrist watch on the free version download something else. ### 1/5 — Very archaic app *2024-04-15, version 2.4.1* Cumbersome to use, insufficient instructions, not worth it. ### 1/5 — Take photo checkpoint *2023-04-27, version 2.3.2* Take photo functionality to do a checkpoint, It doesnt works in last version (full license). said ‘old photo is not supported’ ### 1/5 — Deludente *2023-04-18, version 2.3.0* L’applicazione consente la misurazione solo 5 volte per orologio, dopo la quinta è necessario pagare. ### 1/5 — Not Free *2023-03-14, version 2.2.0* You can only use it 5 times before it makes you buy. ### 1/5 — Garbage app and garbage developer *2022-01-29, version 1.6.1* As per developer’s instructions in the app, this thing spits out random numbers that are wildly inaccurate on both quartz and mechanical pieces. Don’t bother spending the dollar on this app considering it is functionally broken, especially when there are free apps out there (such as Toolwatch) that actually work. Not to mention the developer would rather throw a fit like a child than actually seek to solve issues and provide solutions ### 2/5 — Great app until it deleted all my data *2024-07-05, version 2.4.1* Seriously LOVED this app until twice in the past several months I opened it, it hung, and then all my accumulated data was gone. ### 2/5 — Update deleted all data *2024-04-25, version 2.4.1* I’d been loving the app and the ease of use (and history it collected). However, after the recent update, it deleted all my entires! Any thoughts on why? Is this recoverable? ## Most praised reviews (10 highest-rated) ### 5/5 — Does the job *2026-01-04, version 3.3.0* Great for tracking mechanical watch accuracy and only a dollar to access all the features. Only suggestion for quality of life is the beeping sound mechanic for the 57, 58, 59, and 60 sec. It only works/ makes sound if the iPhone is not in silent mode (bell icon off). ### 5/5 — Great app! *2025-12-31, version 3.3.0* This app is a must-have for anyone with mechanical watches - love the watch accuracy tracking - the beeping on the reference clock is a gamechanger! ### 5/5 — Easy to use *2025-12-27, version 3.3.0* Simple. Does exactly what it claims, and makes it easy. One thing I do wish it had is notifications/reminders ### 5/5 — Nearly Perfect *2025-12-19, version 3.3.0* Very simple but effective. Only improvement could be a ‘current time’ button when you start tracking a watch to save time (rather than set then click to record current time). It’s free and doesn’t pester you with ads. ### 5/5 — Excellent App *2025-12-11, version 3.3.0* Wow, a very well designed app that only requires a very cheap 1 dollar payment for unlimited use. Very cool that it allows for measurement of time at not just the 0s mark but at the other 15s mark intervals too ### 5/5 — Must for Automatics *2025-11-10, version 3.3.0* This is a must for automatic movement enthusiasts. Very easy to use, the watch article compilation is a nice touch as well. Full app for only .99 one time purchase. ### 5/5 — Excellent *2025-09-27, version 3.3.0* La perfection pour la dérive quotidienne ! Remplace avec des améliorations toutes les app obsolètes. Tarif dérisoire. À recommander pour vérifier la précision simplement. ### 5/5 — Great app made by an enthusiast *2025-09-25, version 3.3.0* A simple app that does what its job well, with no annoying ads in the free version, and seems to be made by an hobbyist. I love it. My only gripe is the limited number of checkpoints in the free version, but I was happy to pay a dollar to upgrade. ### 5/5 — Все супер *2025-09-07* Но сбивается время ,формат времени ! ### 5/5 — Must have for watch enthusiasts *2025-09-05, version 3.2.2* A simple & intuitive way to keep track of watch accuracy --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-10.*