# CK-IN — Fitness Tracking & Community

> Fitness Tracking & Community (iPhone/iPad app by Johannes Duo.)

- Source: https://appshunter.io/ios/app/ck/id6756836121 (this page in markdown: same URL + `.md`)
- Developer: [Johannes Duo](https://appshunter.io/developer/1863145863)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 85 MB
- Languages: American English
- Released: 2026-01-17
- Data updated: 2026-02-23
- User reviews in markdown: https://appshunter.io/ios/app/ck/id6756836121/reviews.md

## What is CK?

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


## Version history (last 2 releases)

### 1.1 — 2026-01-21

What's New in Version 1.1

We’ve made critical improvements to help you stay consistent:

Timer Intelligence Update: Your workout timer now tracks precisely even when the app is in the background or your phone is locked. No more paused timers.
Smart Completion Alerts: You will now receive a "Workout Complete" notification exactly when your planned duration ends, so you know it’s time to check out—even if your phone is in your pocket.
Performance Improvements: Enhanced session stability and faster load times.
Stay consistent. Stay locked in.

### 1.0 — 2026-01-17

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-02-23.*