Calculate the necessary length for drive system belts with this utility. Supports both open and cross belt arrangements, requiring only pulley diameters and center length for accurate results.



247+ iOS apps curated and reviewed
Every iPhone needs a few good belt length calculator calcon apps. We benchmark 247+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | No | No | May 2026 | ||
| 2 | $1.99 | — | No | No | Oct 2026 | ||
| 3 | Free | 4.7★ (61K) | No | No | Nov 2026 | ||
| 4 | Free | 4.9★ (410K) | Yes | No | Nov 2026 | ||
| 5 | Free | 4.2★ (1.4K) | No | No | Nov 2026 | ||
| 6 | Free | 4.5★ (147K) | Yes | Yes | Nov 2026 | ||
| 7 | Free | — | No | No | May 2026 | ||
| 8 | Free | 5.0★ (3) | No | No | Nov 2026 |









Calculate the necessary length for drive system belts with this utility. Supports both open and cross belt arrangements, requiring only pulley diameters and center length for accurate results.




This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.