Calculates remaining oxygen in a cylinder for ambulatory users. Input device, liter flow, and cylinder size for precise remaining hours and minutes. Provides peace of mind for oxygen users on the go.
HYPOXI by Fernwood Womens Health Club



210+ iOS apps curated and reviewed
Out of 210+ hypoxi apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | No | No | Aug 2026 | ||
| 2 | Free | 4.5★ (8) | No | No | May 2026 | ||
| 3 | Free | 4.8★ (845) | No | No | Sep 2026 | ||
| 4 | Free | 4.3★ (106) | No | No | Sep 2026 | ||
| 5 | Free | 3.6★ (266) | No | No | Sep 2026 | ||
| 6 | Free | 2.8★ (13) | No | No | Jul 2026 | ||
| 7 | Free | 4.1★ (474) | Yes | Yes | Sep 2026 | ||
| 8 | Free | 4.9★ (14) | Yes | Yes | Aug 2026 |






Calculates remaining oxygen in a cylinder for ambulatory users. Input device, liter flow, and cylinder size for precise remaining hours and minutes. Provides peace of mind for oxygen users on the go.






This app serves as a comprehensive diving logbook and planning tool. It automatically records dive data, tracks gas consumption, and supports various diving disciplines. Users can also discover dive sites, manage gear, and share experiences with a community.