247+ iOS apps curated and reviewed
Out of 247+ oxygen calculation tool apps on iOS, 17 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 |  | $0.99 | 4.8★ (165) | No | No | Oct 2026 | |
| 2 |  | Free | 4.6★ (11) | No | No | Oct 2026 | |
| 3 |  | Free | — | No | No | Jul 2026 | |
| 4 |  | Free | 5.0★ (2) | No | No | May 2026 | |
| 5 |  | $2.99 | 1.0★ (1) | No | No | May 2026 | |
| 6 |  | Free | — | — | No | Jul 2026 | |
| 7 |  | Free | — | No | No | May 2026 | |
| 8 |  | Free | 4.0★ (1) | No | Yes | Oct 2026 |
This app helps medical transport professionals quickly calculate usable oxygen supply based on cylinder pressure and flow rate. It also includes a drip rate calculator for medication math and a reference section with conversion factors. Features a countdown timer and dark mode compatibility.
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.
