248+ iOS apps curated and reviewed
The best ruler inches free apps on iPhone average 3.6★ across 248+ titles — we've ranked them by what real users actually keep on their phones. Updated October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.3★ (35K) | No | Yes | Oct 2026 | |
| 2 |  | Free | 3.5★ (934) | No | Yes | Oct 2026 | |
| 3 |  | Free | 4.4★ (1.1K) | Yes | Yes | Oct 2026 | |
| 4 |  | Free | 4.4★ (89K) | No | Yes | Oct 2026 | |
| 5 |  | Free | — | Yes | No | May 2026 | |
| 6 |  | Free | 2.6★ (40) | No | No | Aug 2026 | |
| 7 |  | Free | 1.0★ (4) | No | No | Aug 2026 | |
| 8 |  | Free | 3.9★ (205) | No | No | May 2026 |
This app provides a versatile toolkit for all your measurement needs. It includes a classic ruler, a tape measure, and a camera ruler for precise measurements. Easily switch between units and document your findings by adding measurements directly to photos.
This app allows you to measure lengths accurately in both inches and centimeters. It provides a simple and straightforward tool for quick measurements.
This utility app provides a portable ruler for on-the-go measurements. It also includes a suite of additional tools like a protractor, spirit level, and various meters for diverse measurement needs.
