215+ iOS apps curated and reviewed
The best carbon drive belt tension tool apps on iPhone average 3.9★ across 215+ titles — we've ranked them by what real users actually keep on their phones. Updated July 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 2.7★ (21) | No | No | Jul 2026 | |
| 2 |  | Free | 3.4★ (10) | No | No | May 2026 | |
| 3 |  | Free | 4.5★ (14K) | Yes | Yes | Sep 2026 | |
| 4 |  | Free | 3.5★ (6) | No | No | Aug 2026 | |
| 5 |  | $4.99 | 3.5★ (2) | No | No | Sep 2026 | |
| 6 |  | Free | 4.9★ (2.3M) | Yes | No | Sep 2026 | |
| 7 |  | Free | 4.9★ (9.5K) | No | No | Sep 2026 | |
| 8 |  | Free | 3.3★ (498) | No | No | Sep 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.
This application provides a comprehensive diagnostic tool for belt drive systems. It measures key parameters like pulley speeds, belt frequency, tension, and system geometry to ensure optimal performance, energy efficiency, and extended service life.
Transform your device into a versatile toolkit with a comprehensive suite of measuring instruments. This app offers a metronome, stopwatch, timer, ruler, level, and various sensors to assist with a wide range of tasks.
