Watch Accuracy: Timing Log
Seconds a day, by position
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
A mechanical watch does not keep one rate. It keeps six — one for every position it can rest in. That is the whole idea behind this app.
Catch the second, log where the watch spent the night, and the app solves the rest: how many seconds a day it gains or loses worn, and how many it gains or loses lying dial up, dial down, crown up, crown down, crown left or crown right.
THE ONE ANSWER IT GIVES
Tonight, rest it dial down — and tomorrow you are +1 second instead of +6.
That single line is the product. A watch that runs fast on the wrist usually runs slow in at least one resting position, and choosing that position every night is how collectors and watchmakers have flattened daily rate for a century. It costs nothing, it touches no screw, and until now nobody kept the arithmetic for you.
HOW A READING WORKS
Watch the seconds tick on screen. Tap the moment your watch shows a full second, set what it showed, and say where it rested since the last reading. Two taps and a pick. That is the entry.
WHAT IT WORKS OUT
• A rate for every resting position, solved from your own readings with a least-squares fit — not a single average pretending to be the truth.
• A confidence level per position, so a number built on one night is never dressed up as a settled one.
• The drift curve: where your watch will be in 7, 14 or 30 days, with your own reset band drawn across it.
• The day it crosses that band, so you set the watch before it annoys you rather than after.
• Power reserve since the last wind, for automatics and hand-wound movements.
WHAT IT IS NOT
It is not a timegrapher. It does not listen to your watch through the microphone and it never claims to measure amplitude or beat error. It measures the thing you actually live with — how far off the watch is, day after day — and it does that without a microphone, without hardware and without a subscription to anyone's cloud.
It is also not a service manual. A movement running far outside its range needs a watchmaker, and the app says so instead of pretending otherwise.
ALSO
• Any number of watches, automatic, hand-wound or quartz. Quartz skips the position engine and just shows its rate.
• Reset, regulation, service and winding logged — a reset never poisons the fit.
• Streaks, a month calendar, 80 achievements and daily, weekly and monthly challenges.
• Works offline. No account, no server, no tracking.
The −4/+6 seconds a day range offered as a target is the published chronometer window. This app carries no certification and claims no connection to any standards body.
Watch Log Pro is offered as a monthly auto-renewing subscription, or as a one-time lifetime purchase. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours prior to the end of that period. You can manage and cancel your subscriptions in your Apple Account settings after purchase.
Terms of Use: https://doesonejob.com/crownrest/terms/
Privacy Policy: https://doesonejob.com/crownrest/privacy/
Questions: crownrest@doesonejob.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
General improvements and minor fixes. Simpler pricing: a monthly plan, and a one-time lifetime purchase.
The developer, YUSUF OCAL, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- YUSUF OCAL
- Size
- 11.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 55 more
- English, Albanian, Arabic, Basque, Bengali, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, Estonian, Filipino, Finnish, French, Galician, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Kannada, Korean, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Persian, Polish, Portuguese, Punjabi, Romanian, Russian, Serbian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Watch Log Pro Monthly $2.99
- Watch Log Pro Lifetime $13.99
- Watch Log Pro Weekly $4.99
- Copyright
- © Yusuf Ocal