249+ iOS apps curated and reviewed
The best gymnext flex timer apps on iPhone average 4.7★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.8★ (2.1K) | No | Yes | Aug 2026 |
| 2 |  | Free | — | No | No | May 2026 |
| 3 |  | Free | — | No | No | May 2026 |
| 4 |  | Free | 4.7★ (24K) | No | Yes | Aug 2026 |
| 5 |  | Free | 4.8★ (15K) | Yes | Yes | Aug 2026 |
| 6 |  | Free | — | No | No | Aug 2026 |
| 7 |  | Free | — | No | Yes | Jun 2026 |
| 8 |  | Free | — | — | No | Jul 2026 |
This app offers advanced interval training timing with customizable modes and the ability to control an external LED display. It integrates with wearables and heart rate monitors for a comprehensive workout experience.
This app provides a versatile interval timer for various workout types like Tabata, HIIT, and circuit training. It features a clear, full-screen display, customizable alerts, and background operation. Users can also utilize a stopwatch and countdown timer, with integration for Apple Health.
This app provides a customizable interval timer for high-intensity interval training (HIIT) and circuit workouts. Easily set up work, rest, and repeat intervals, track your progress, and integrate with your health data. Enjoy your workouts with background music and notifications.
This app provides a customizable interval timer for various fitness activities like boxing, HIIT, and Muay Thai. It offers features like custom preset building, live activity controls, and voice callouts. The app is free to use with optional support for development.
Create custom timers with repeating intervals and pauses for various activities like sports, study, or yoga. Offers a simple and intuitive design for individual customization.
This interval training app supports HIIT, circuit, and Tabata workouts with customizable rounds and cycles. It offers background operation, screen flashing, and voice guidance for an enhanced fitness experience. An Apple Watch companion app is also available.
This app provides a customizable interval timer for various workouts, allowing users to set single or multiple work and rest periods. It offers extensive customization options for alarms, program saving, and display, ensuring a tailored timing experience for any fitness routine.
This app provides a versatile interval timer for high-intensity workouts like AMRAP, EMOM, and Tabata. It features a clean, easy-to-read display and integrates with Apple Health to record workout data. Users can also access motivational countdowns from famous fitness personalities.