# CCRtools

> CCRtools (iPhone/iPad app by Kai-Uwe Sattler.)

- Source: https://appshunter.io/ios/app/ccrtools/id6745844453 (this page in markdown: same URL + `.md`)
- Developer: [Kai-Uwe Sattler](https://appshunter.io/developer/500229044)
- Category: Sports, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 18.2 · 1 MB
- Languages: English, German
- Released: 2026-04-14
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/ccrtools/id6745844453/reviews.md

## What is CCRtools?

CCRtools is application for closed-circuit rebreather (CCR) divers. CCRtools helps you prepare for dives safely with checklists, gas blending calculations, O₂ sensor tracking, and standard diving calculators. Checklists can be downloaded, created or modified and can contain checks, values to enter and timers. The sensor log supports up to five O₂ sensors displaying the trend of linearity.


## Version history (last 3 releases)

### 1.3 — 2026-05-20

Minor fixes in Sensor Log

### 1.2 — 2026-05-06

* Minor fixes

### 1.0 — 2026-04-14

No release notes.

## More apps by Kai-Uwe Sattler

- [OSTConf](https://appshunter.io/ios/app/ostconf/id1404182943)

All apps by Kai-Uwe Sattler: https://appshunter.io/developer/500229044

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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 2026-06-01.*