249+ iOS apps curated and reviewed
The best length calculator apps on iPhone average 4.3★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.0★ (2) | No | Yes | Sep 2026 | |
| 2 |  | Free | 4.4★ (9.3K) | No | Yes | Sep 2026 | |
| 3 |  | Free | 4.8★ (40K) | No | Yes | Sep 2026 | |
| 4 |  | Free | 4.7★ (4.8K) | Yes | Yes | Sep 2026 | |
| 5 |  | $1.99 | — | No | No | Jun 2026 | |
| 6 |  | $0.99 | — | No | No | Jul 2026 | |
| 7 |  | Free | — | No | No | May 2026 | |
| 8 |  | $2.99 | — | No | No | Aug 2026 |
This construction calculator streamlines measurements with a visual ruler and smart keypad, reducing taps for faster calculations. It offers real-time results, history recall, and one-handed operation for tradespeople.
This app provides a convenient way to perform calculations involving feet and inches. It features a visual tape measure display and supports fractions and mixed decimals, showing results in feet, inches, and centimeters.
This app is a powerful construction calculator designed for professionals working with dimensions. It offers a wide range of solutions for dimensional math, right angle calculations, area and volume, and special functions, helping to improve speed and accuracy in layouts, bids, and estimates.
