Twelve O'clock vs PurgeShot
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Twelve O'clock
Easily track the accuracy of your mechanical watches over time. Manually log checkpoints to calculate seconds per day and visualize performance with charts. Manage your watch collection with photos and learn more about horology.
- Manage watch collection
- Add/edit/remove watches
- Include watch photos
- Track watch accuracy
- Calculate seconds per day
- View accuracy charts
- Horology content
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Twelve O’clock is an app that helps track your watch accuracy easily in a realistic way. I can’t stress this enough: it’s “tracking”, not measuring instantaneous accuracy like a timegrapher device. It’s a manual and oldschool job but it brings so much fun. It reminds me of the old days when I had to synchronize my watch to the clock on the TV at 7pm every day. With Twelve O'clock you can: ** MANAGE YOUR WATCH COLLECTION * Add, edit, remove any item in a list of your watch collection * Include a nice wristshot of each watch ** KNOW YOUR WATCH ACCURACY * Simply add some checkpoints and let the app calculate the accuracy in *second per day* * A nice chart of the accuracy over the time ** LEARN MORE ABOUT HOROLOGY * Curated content for watch lovers (like me)
PurgeShot
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PurgeShot watches your screenshot folder and gives every new screenshot a burn timer. When the timer runs out, the screenshot is permanently deleted — no manual clean-up needed. HOW IT WORKS • Take a screenshot — PurgeShot detects it instantly • A notification appears with a countdown timer • Adjust the timer, keep it, or send it to the Incinerator Bin • When the timer expires, the screenshot is gone for good INCINERATOR BIN Changed your mind? Screenshots you're not sure about go to the Incinerator Bin — a private holding area with its own timer. Restore anything before it's permanently incinerated. FULLY PRIVATE Everything happens on your device. Your screenshots are never uploaded, shared, or sent anywhere. PurgeShot has no server, no account, and no cloud sync. CUSTOMISABLE TIMERS Set your default burn timer from 10 minutes to 7 days. Override it per screenshot. Set a separate Bin timer from 1 hour to 30 days. Change everything any time in Settings. WORKS IN THE BACKGROUND PurgeShot runs quietly in the background and cleans up expired screenshots even when you're not using it. CLEAN, MINIMAL DESIGN A distraction-free interface that stays out of your way. Dark mode supported.
Screenshots
Verdict
The clearest difference is in-app purchases: PurgeShot at none against Twelve O'clock's 1. Twelve O'clock's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement 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. Twelve O'clock sells 1 one-off in-app purchase. PurgeShot asks for nothing beyond the download.
Twelve O'clock ships an update every 3 weeks, PurgeShot every 3 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | Twelve O'clock | PurgeShot |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (83 ratings) — better | — |
| Positive reviews | 91.1% of reviews | — |
| Number of ratings | 83 — better | — |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 46 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Hieu Pham | WEB REGISTER Ltd. |
Bugs and requests
Twelve O'clock
Reported bugs
11 issues- 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
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- 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
Requested features
18 requests- 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
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- 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
PurgeShot
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Twelve O'clock
- Twelve Plus$1.99
PurgeShot
No in-app purchases









