250+ iOS apps curated and reviewed
With an average user rating of 4.2★, the tool belt logic category is one of the App Store's strongest. Browse all 250+ apps we track, sorted so the most loved ones surface first.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 2.7★ (21) | No | No | Sep 2026 | |
| 2 |  | Free | 4.8★ (235K) | No | No | Oct 2026 | |
| 3 |  | Free | — | Yes | Yes | Oct 2026 | |
| 4 |  | Free | 4.8★ (218K) | No | No | Oct 2026 | |
| 5 |  | Free | 3.4★ (10) | No | No | Oct 2026 | |
| 6 |  | Free | 5.0★ (3) | No | No | Sep 2026 | |
| 7 |  | Free | 1.1★ (15) | No | No | May 2026 | |
| 8 |  | Free | 4.7★ (5.1K) | No | No | Oct 2026 |
This app uses your phone's microphone to measure the sonic vibration frequency of a belt drive. It helps you determine if your bicycle belt tension needs adjustment by comparing the frequency to a provided chart. It also offers a calculator for bicycle belt drive parameters like speed ratio and center distance.
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