This app offers a straightforward interval timer designed for Apple Watch, iPhone, and iPad. It features a clean interface, live heart rate monitoring, haptic feedback, and detailed workout summaries, seamlessly integrating with the Health app.



245+ iOS apps curated and reviewed
The best hiit treadmill apps on iPhone average 4.6★ across 245+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | $3.99 | 4.2★ (12) | No | No | Sep 2026 | ||
| 2 | Free | 4.9★ (48K) | No | Yes | Sep 2026 | ||
| 3 | Free | 5.0★ (1) | No | No | Jul 2026 | ||
| 4 | Free | 4.8★ (31K) | Yes | Yes | Sep 2026 | ||
| 5 | Free | 4.3★ (151) | No | Yes | May 2026 | ||
| 6 | Free | 4.5★ (534) | No | Yes | Sep 2026 | ||
| 7 | Free | 4.7★ (289) | No | Yes | Sep 2026 | ||
| 8 | Free | 4.4★ (31) | Yes | Yes | Jul 2026 |



This app offers a straightforward interval timer designed for Apple Watch, iPhone, and iPad. It features a clean interface, live heart rate monitoring, haptic feedback, and detailed workout summaries, seamlessly integrating with the Health app.





This app offers a dynamic high-intensity interval training (HIIT) experience with over 1000 unique exercises, ensuring you never do the same workout twice. It's beginner-friendly with customizable workout lengths, exercise types, and music to keep you motivated and prevent plateaus.





Control your hydrotherapy treadmill with ease. Adjust speed, water fill level, temperature, and timer directly from your iPhone or iPod. Ideal for managing aquatic therapy sessions.