247+ iOS apps curated and reviewed
If you already know HTH™ | Test to Swim™, this is the deeper bench. 247+ hth test apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.7★ (4.1K) | No | No | Nov 2026 | |
| 2 |  | Free | 4.5★ (5.5K) | No | No | Oct 2026 | |
| 3 |  | Free | 1.0★ (1) | No | Yes | Sep 2026 | |
| 4 |  | Free | 1.8★ (4) | No | Yes | Oct 2026 | |
| 5 |  | Free | — | Yes | Yes | Oct 2026 | |
| 6 |  | Free | — | Yes | Yes | May 2026 | |
| 7 |  | $0.99 | 1.0★ (2) | — | No | Jun 2026 | |
| 8 |  | Free | — | No | 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.
Prepare for major exams and tests with practice questions and vocabulary flashcards. Covers a wide range of subjects including DSST, CLEP, AP, Regents, and career-specific certifications.
