245+ iOS apps curated and reviewed
If you already know HTH™ | Test to Swim™, this is the deeper bench. 245+ hth test apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.5★ (1.2K) | Yes | No | Sep 2026 | |
| 2 |  | Free | 4.5★ (5.4K) | No | No | Sep 2026 | |
| 3 |  | Free | 4.1★ (148) | Yes | No | Sep 2026 | |
| 4 |  | Free | 1.4★ (8) | No | Yes | May 2026 | |
| 5 |  | Free | 4.0★ (1) | No | Yes | May 2026 | |
| 6 |  | Free | 1.0★ (1) | No | Yes | Sep 2026 | |
| 7 |  | Free | 1.5★ (2) | — | No | Jun 2026 | |
| 8 |  | Free | — | Yes | Yes | May 2026 |
This app helps pool and spa owners maintain water quality by analyzing test strip results. It provides instant recommendations, step-by-step instructions, and access to helpful resources for clear and balanced water.
This app facilitates at-home COVID-19 self-testing using an FDA EUA Authorized OTC antigen rapid test. It provides a simple, 15-minute process with step-by-step video guidance for easy result interpretation and sharing.
Assess your cognitive abilities with a comprehensive IQ test. This application provides a quick and accurate assessment of your intelligence quotient, delivering your score immediately upon completion. It features a timed test with carefully selected questions to gauge your intellectual capacity.
