247+ iOS apps & games curated and reviewed
Fastener Calc is the household name in fastener calc, but it's far from the only option. We track 247+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | $2.99 | 1.0★ (1) | No | No | Oct 2026 | |
| 2 |  | Free | 4.0★ (5) | No | No | May 2026 | |
| 3 |  | Free | — | No | No | Aug 2026 | |
| 4 |  | Free | — | No | No | May 2026 | |
| 5 |  | Free | — | No | No | Aug 2026 | |
| 6 |  | Free | 5.0★ (4) | No | No | Oct 2026 | |
| 7 |  | Free | 5.0★ (8) | No | No | Sep 2026 | |
| 8 |  | Free | — | Yes | No | May 2026 |
This app provides engineers, technicians, and students with essential tools for bolted joint development. It includes converters for various units and geometrical and mechanical calculators for dimensioning and design in joining technology.
This engineering tool provides instant access to critical dimensions for various screw thread standards, including Unified, Whitworth, and ISO Metric. It also allows for the creation and calculation of custom thread sizes and pitches, eliminating the need for physical reference books.
