# O2 Timer

> O2 Timer (iPhone/iPad app by Aeronautical Data Systems Inc..)

- Source: https://appshunter.io/ios/app/o2-timer/id763788344 (this page in markdown: same URL + `.md`)
- Developer: [Aeronautical Data Systems Inc.](https://appshunter.io/developer/552304929)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 2 MB
- Languages: English
- Released: 2013-11-28
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/o2-timer/id763788344/reviews.md

## What is O2 Timer?

The O2 Timer application analyzes each specific aircraft oxygen requirement in various situations and provides the pilot with the amount of time the oxygen resource will last in that scenario.


## Version history (last 1 release)

### 4 — 2020-08-29

Minor UI Fixes

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## More apps by Aeronautical Data Systems Inc.

- [Ergo360 Fuel & O-2 Solutions](https://appshunter.io/ios/app/ergo360-fuel-and-o-2-solutions/id552304846)
- [O2gO2](https://appshunter.io/ios/app/o2go2/id895990670)
- [V2 Checklist](https://appshunter.io/ios/app/v2-checklist/id1323804522)
- [Ergo180](https://appshunter.io/ios/app/ergo180/id1354425604)
- [ErgoBlue](https://appshunter.io/ios/app/ergoblue/id1481779003)

All apps by Aeronautical Data Systems Inc.: https://appshunter.io/developer/552304929

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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 2026-05-19.*