CK-IN is made and published by Johannes Duo. AppBrain is an independent app data site and isn't affiliated with Johannes Duo. The app name, icon, screenshots and description belong to Johannes Duo and are shown as published on the App Store.
AppBrain's verdict
- Last updated
- January 21, 2026
- Size
- 84.7 MB
User feedback
Ratings and reviews on the App StoreComments on CK-IN for iOS
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Store listing
By Johannes Duo, from the App Store
Screenshots by Johannes Duo, from the the App Store listing
Description by Johannes Duo Written by the developer, not by AppBrain. Click to read.
CK-IN, Build Consistency. Stay Accountable. Don't Skip.
CK-IN is a daily fitness accountability app built to help you show up even on the days you don't feel like it. This isn't about perfect workouts, calorie counting, or complicated plans. CK-IN is about consistency, commitment, and people who notice when you don't show up.
By using this app, you agree to our Terms of Use: https://www.ck-in.co/terms.html and Privacy Policy: https://www.ck-in.co/privacy.html
CK-IN is a daily fitness accountability app built to help you show up even on the days you don't feel like it. This isn't about perfect workouts, calorie counting, or complicated plans. CK-IN is about consistency, commitment, and people who notice when you don't show up.
By using this app, you agree to our Terms of Use: https://www.ck-in.co/terms.html and Privacy Policy: https://www.ck-in.co/privacy.html
Safety and technology
Found in the app by AppBrain- Price
- Free
- App size
- 84.7 MB
- Content rating
- Everyone
Technologies used by CK-IN
Releases
Updates seen on the App Store- Version
- 1.1
- Launched
- January 2026
No changelog data
Alternatives
Similar apps and more from Johannes DuoAlternatives to CK-IN
Rankings
App Store top chartsApp Store Rankings for CK-IN
This app is not ranked
About the app and developer
About CK-IN
CK-IN is a health & fitness app developed by Johannes Duo.
What is the rating of CK-IN?
CK-IN has no ratings yet.
Is CK-IN free?
CK-IN is free. The app size is 84.72 MB. The latest version available is 1.1. The last update was on January 21, 2026.
What are the requirements for CK-IN?
The app has a content rating of Everyone. The app has been available on the App Store since January 2026.
Developer information for Johannes Duo
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