246+ iOS apps & games curated and reviewed
O2gO2 is the household name in o2go2, but it's far from the only option. We track 246+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 3.0★ (2) | No | Yes | May 2026 | |
| 2 |  | Free | 4.6★ (7.5K) | Yes | Yes | Sep 2026 | |
| 3 |  | Free | 4.9★ (27K) | No | Yes | Sep 2026 | |
| 4 |  | Free | 4.5★ (184) | No | No | Sep 2026 | |
| 5 |  | Free | 4.2★ (6.8K) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | 1.7★ (178) | No | No | Sep 2026 | |
| 7 |  | Free | 4.7★ (62K) | Yes | Yes | Sep 2026 | |
| 8 |  | Free | 4.4★ (31K) | No | Yes | Sep 2026 |
This utility app converts oxygen cylinder pressure into remaining time, helping users manage their compressed gas resources. It provides visual indicators and calculates duration based on tank size, current pressure, and flow rate.
Simulate opening virtual cases and collecting skins from a popular shooter game. Build your dream inventory, trade up items, and compete with other collectors. Enjoy mini-games and special events for bonus rewards.
Generate, send, and track professional invoices and estimates directly from your mobile device. Streamline your billing process with quick client setup, saved product details, and automated tax calculations. Easily manage payments and debts with built-in reports.
