249+ iOS apps curated and reviewed
The best ruler photo apps on iPhone average 3.4★ 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 | 1.5★ (44) | No | No | Aug 2026 | |
| 2 |  | Free | 4.3★ (35K) | No | Yes | Sep 2026 | |
| 3 |  | Free | 4.6★ (45K) | Yes | Yes | Sep 2026 | |
| 4 |  | Free | 4.2★ (6.1K) | Yes | Yes | Sep 2026 | |
| 5 |  | Free | 4.2★ (2.6K) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | — | No | Yes | Sep 2026 | |
| 7 |  | Free | — | No | No | Jul 2026 | |
| 8 |  | Free | — | No | No | Aug 2026 |
This app allows you to measure objects directly on photos. Simply take a picture, mark a known object for reference, and then draw measurements on other items within the same image. It supports both metric and imperial units and offers intuitive editing tools.
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 augmented reality app transforms your phone into a versatile measuring tool. Accurately measure distances, surfaces, angles, and even detect studs. Visualize furniture placement and create floor plans with ease.
