régulateur vs Twelve O'clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
régulateur
This utility app assists with setting watches and clocks. It displays a second time zone, current moon phase, and detailed perpetual calendar information including the leap year cycle.
- Second time zone display
- Current moon phase
- Perpetual calendar details
- Leap year cycle information
- Watch and clock setting assistance
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Régulateur includes several features that make it a great tool for while setting your watch or clock. A second time zone can be set and stored in the app for setting your GMT watches. The current moon phase is displayed for setting your annual calendar timepiece. For perpetual calendars the app displays the month, date, day, and even the time in the leap year cycle.
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)
Screenshots
Verdict
The clearest difference is in-app purchases: régulateur at none against Twelve O'clock's 1. Twelve O'clock's advantage is update cadence (every 3 weeks vs every 11 months) and review sentiment (91% vs 75%). On price, rating, ads and device support 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. régulateur asks for nothing beyond the download.
régulateur holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Twelve O'clock has 82 ratings behind it against 12, so its average is the more settled of the two. Written reviews complicate that: 75% of régulateur's written reviews are positive against 91% of Twelve O'clock's, so the app with the better star average is not the one people write more warmly about.
régulateur ships an update every 11 months, Twelve O'clock every 3 weeks. The most recent releases landed on October 2, 2026 and October 12, 2026 respectively.
| Parameter | régulateur | Twelve O'clock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (12 ratings) — better | 4.4 (82 ratings) |
| Positive reviews | 75.0% of reviews | 91.1% of reviews — better |
| Number of ratings | 12 | 82 — better |
| Update frequency | Every 11 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Eric Kunz | Hieu Pham |
Customer experience
régulateur
Twelve O'clock
Bugs and requests
régulateur
Not enough reviews yet to summarise bugs or 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
In-app purchases
régulateur
No in-app purchases
Twelve O'clock
- Twelve Plus$1.99
Questions
Is régulateur free?
Is Twelve O'clock free?
Which has better reviews, régulateur or Twelve O'clock?
Do régulateur or Twelve O'clock have ads?
Which is updated more often, régulateur or Twelve O'clock?
Other comparisons
