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 | Jul 2026 |
| 2 |  | Free | 4.6★ (29K) | Yes | No | Jul 2026 |
| 3 |  | Free | 4.6★ (14K) | Yes | No | Jul 2026 |
| 4 |  | Free | 4.7★ (6K) | No | No | Jul 2026 |
| 5 |  | Free | — | Yes | No | Jul 2026 |
| 6 |  | Free | 2.5★ (20) | No | No | Jul 2026 |
| 7 |  | Free | 4.6★ (120) | No | No | Jul 2026 |
| 8 |  | Free | 5.0★ (20) | No | No | Jul 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.
Access global healthcare resources, find doctors and hospitals worldwide, and manage your health plan details. Connect with telemedicine services, track spending, and submit claims easily. Get safety alerts and health information for international travel.
This app helps Blue Cross and Blue Shield members find doctors, hospitals, and pharmacies worldwide. It also includes medication equivalents, medical phrase translation, and international claim filing. Access embassy information and local emergency numbers for global health support.
Access trusted medical care and health information globally. Find providers, medications, and translate medical terms. Receive destination-specific alerts and manage claims for insured members.
Discover and shop for Japanese street fashion brands like 9090s, Younger Song, genzai, and MySugarBabe (MSB). This official app provides a curated selection of popular streetwear items for easy browsing and purchasing.
This app generates precise sine wave tones to help remove water and debris from your device's speakers. Easily adjust frequencies by swiping on the screen, and enjoy features like Apple Watch control and background operation. Premium subscribers gain access to advanced waveforms, unlimited sessions, and an ad-free experience.
This app helps pool professionals and beginners calculate and manage pool water chemistry. It provides precise chemical adjustments based on your test kit readings and allows for custom formula sharing. Supports various pool types and offers flexible unit conversions.
Easily test your pool's water chemistry and receive personalized solutions for common issues like algae or cloudy water. Track your water test history and find nearby stores for convenient service and shopping.
This app provides free wireless phone service, including a smartphone and monthly plan with unlimited talk, text, and data. Manage your account, check usage, purchase extra data, and activate international calling. Refer friends to earn rewards and shop for new devices and accessories.
Access Martyrs Foundation services easily from your mobile device. Submit aid requests, complaints, and suggestions, track your transactions, and stay updated on official news and decisions. Learn about the rights and services for martyrs' families.
Test your device's audio output with a variety of sounds and a built-in sound level meter. Analyze speaker performance and measure output in terms and Hertz (Hz) for detailed insights.
Listen to inspiring teaching, preaching, and uplifting music 24/7. Visit the official website for more details and the program schedule.
Track your progress as you practice shooting by logging each shot taken. This app helps you monitor different shot styles and compete with friends to reach a 10,000-shot goal. All your shooting sessions are saved for free.
This tool helps maintain swimming pools by calculating water volume and adjusting chemical levels. It also assesses water chemistry to determine scaling potential and calculates chlorine compounds for proper treatment.
This app provides flexible prepaid wireless plans with nationwide coverage and no contracts. Manage your service, track usage, and add features easily. Enjoy free international calling to over 200 countries.
This app helps members of a specific federal employee health program submit medical claims for services received outside the U.S. It offers tools to find international providers, translate medications and medical terms, and securely submit claims and receipts.