249+ iOS apps & games curated and reviewed
H2O Academy is the household name in water treatment, but it's far from the only option. We track 249+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (1) | No | No | May 2026 | |
| 2 |  | Free was $7.00 | — | No | Yes | May 2026 | |
| 3 |  | Free | 4.7★ (14) | No | Yes | Sep 2026 | |
| 4 |  | Free | 4.4★ (58) | No | No | Aug 2026 | |
| 5 |  | Free | 4.5★ (620) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | — | No | Yes | Aug 2026 | |
| 7 |  | Free | 4.8★ (9) | No | No | Sep 2026 | |
| 8 |  | Free | 1.5★ (2) | No | No | May 2026 |
Prepare for your Level 1 Water Treatment Plant Operator exam with this app. It focuses exclusively on the math required, offering clear explanations and unlimited practice problems with hints and answers. Test your knowledge with quizzes designed for practical application.
Prepare for your water treatment operator certification exam with practice questions, realistic simulations, and detailed explanations. Track your progress and stay updated with the latest exam materials to build confidence for exam day and your career.
