249+ iOS apps curated and reviewed
Out of 249+ gear calculator apps on iOS, 14 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 | 3.7★ (3) | No | No | May 2026 | |
| 2 |  | Free | 5.0★ (1) | No | Yes | May 2026 | |
| 3 |  | Free | 3.5★ (6) | No | Yes | May 2026 | |
| 4 |  | $0.99 | 4.2★ (12) | No | No | Sep 2026 | |
| 5 |  | $2.99 | 3.6★ (5) | No | No | Sep 2026 | |
| 6 |  | Free | — | Yes | No | Aug 2026 | |
| 7 |  | Free | — | No | Yes | Aug 2026 | |
| 8 |  | $3.99 | 4.7★ (6) | No | No | Aug 2026 |
Calculate essential dimensions for spur gears and pinions using diametral pitch or module. This tool provides outside diameter, center distance, and ratio for specific gear types.
This professional mechanical design tool helps engineers and enthusiasts calculate and optimize various gear parameters. It offers accurate calculations for different gear types, custom parameter input, and real-time design previews.
Optimize your bicycle's gearing with this comprehensive calculator. Analyze gear ratios, calculate speed at cadence, and manage custom configurations. Features include component browsing, sharing options, and helpful articles.
