250+ iOS apps curated and reviewed
Out of 250+ fartlek interval trainer apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | Oct 2026 | |
| 2 |  | Free | 4.7★ (1K) | No | Yes | Oct 2026 | |
| 3 |  | Free | 4.8★ (14K) | No | Yes | Oct 2026 | |
| 4 |  | Free | 4.8★ (86K) | No | Yes | Oct 2026 | |
| 5 |  | Free | — | No | No | May 2026 | |
| 6 |  | Free | 4.7★ (24K) | No | Yes | Oct 2026 | |
| 7 |  | Free | 5.0★ (4) | No | No | Oct 2026 | |
| 8 |  | Free | — | Yes | Yes | May 2026 |
This running app automatically detects spontaneous intervals during Fartlek runs, providing live color-coded feedback on your effort. It also functions as a powerful timer for structured workouts like HIIT and Tabata, offering detailed metrics and syncing with Strava and Apple Health.
This app simplifies interval and Fartlek running by allowing you to set custom targets for time or distance during hard, easy, and rest efforts. It offers detailed post-run summaries, audio and visual feedback, and an Apple Watch app for enhanced training.
Create and follow custom interval training routines for various fitness activities. This app offers extensive customization for intervals, alerts, and goals, with seamless integration for Apple Watch and Apple Health.
