36+ iOS apps curated and reviewed
If you already know HTH™ | Test to Swim™, this is the deeper bench. 36+ hth apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.5★ (1.2K) | Yes | No | Sep 2026 | |
| 2 |  | Free | 4.6★ (29K) | Yes | No | Sep 2026 | |
| 3 |  | Free | 4.6★ (14K) | No | No | Sep 2026 | |
| 4 |  | Free | 4.7★ (6.1K) | No | No | Sep 2026 | |
| 5 |  | Free | — | Yes | No | Aug 2026 | |
| 6 |  | Free | 2.5★ (20) | No | No | Sep 2026 | |
| 7 |  | Free | 4.6★ (120) | No | No | Aug 2026 | |
| 8 |  | Free | 5.0★ (20) | No | No | Aug 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 helps DIY pool owners maintain their pools with expert water test analysis and personalized product recommendations. It offers troubleshooting for common pool problems and allows users to shop for recommended products online.
Manage your pool and spa maintenance with ease. Get personalized water treatment plans, track your water test history, and access exclusive member deals. Shop for supplies and find local stores effortlessly.
