Ratekeeper: Watch Accuracy
Ratekeeper: Watch Accuracy is made and published by Slow Sunday Software LLC. AppBrain is an independent app data site and isn't affiliated with Slow Sunday Software LLC. The app name, icon, screenshots and description belong to Slow Sunday Software LLC and are shown as published on the App Store.
AppBrain's verdict
New- Rating on App Store
- 5.00
- 2 ratings
- Last updated
- September 8, 2026
Ratekeeper: Watch Accuracy came out 50 days ago. It doesn't have enough ratings yet to judge what users think.
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Releases
Updates seen on the App Store- Version
- 1.0.3
- Launched
- September 2026
No changelog data
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 6.61 MB
- Content rating
- Everyone
Technologies used by Ratekeeper: Watch Accuracy
About the app and developer
About Ratekeeper: Watch Accuracy
Ratekeeper: Watch Accuracy is an utilities app developed by Slow Sunday Software LLC.
User Ratings
Ratekeeper: Watch Accuracy is rated 5.00 out of 5 stars. The rating is based on 2 ratings.
App Information
Ratekeeper: Watch Accuracy is freely available from the App Store. The app size is 6.61 MB. The latest version available is 1.0.3. The last update was on September 8, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since September 2026.
Developer information for Slow Sunday Software LLC
Address:
Store listing
By Slow Sunday Software LLC, from the App Store
Description by Slow Sunday Software LLC Written by the developer, not by AppBrain. Click to read.
The method is a five-second pleasure. Set your watch to true time. A day or two later, tap the screen the instant the second hand crosses twelve. Ratekeeper compares that tap to atomic network time (accurate to hundredths of a second) and, from two readings, works out the watch's rate in seconds per day. Gaining or losing, and by exactly how much.
That's the whole thing. No microphone, no cradle, no gear. Just your watch, your phone, and a tap.
WHAT YOU SEE
• The rate, plainly. "+5.4 spd". In words, "gains 5.4 seconds a day," so the sign never has to be decoded.
• A history that reads like a story. Every reading is grouped into runs (a run begins each time you set the watch) and charted so you can watch a rate settle in as a fresh service beds down, or drift as it comes due for one.
• Against a band, if you want one. Hold a watch to −4/+6 seconds a day, or the tighter 0/+5, and see at a glance whether it's keeping to spec.
• By resting position. Dial up, crown down, on the wrist: a mechanical watch runs differently in each. Ratekeeper breaks the rate down position by position and even suggests how to rest it tonight to bring it closer to true.
• A true-time reference clock. A standalone screen showing network time to the tenth of a second, so you can set any watch against it.
BUILT FOR PEOPLE WHO CARE ABOUT WATCHES
• Manual, automatic, quartz, or something else: each is measured on its own terms.
• Gentle reminders on your rhythm, so readings land a few days apart the way the math wants.
• Export every reading to CSV whenever you like. The data is yours to keep.
PRIVATE BY DEFAULT
No account. No sign-up. No ads. Your watches and readings live on your device and sync across your own devices through your own private iCloud. We can't see them, and nobody is building a profile out of your collection.
Find out how your watches really run. Every one of them has a rate. This is how you learn it.
Have questions? We're here to help. Email us at hello@slowsundaysoftware.com
Terms of Use: https://slowsundaysoftware.com/terms
Privacy Policy: https://slowsundaysoftware.com/privacy