246+ iOS apps curated and reviewed
The best ruler photo apps on iPhone average 3.5★ across 246+ 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 | 1.6★ (45) | Yes | Yes | Oct 2026 | |
| 3 |  | Free | 4.2★ (4.5K) | Yes | Yes | Oct 2026 | |
| 4 |  | Free | 4.2★ (6.1K) | Yes | Yes | Oct 2026 | |
| 5 |  | Free | 4.6★ (45K) | Yes | Yes | Oct 2026 | |
| 6 |  | $0.99 was $1.99 | — | No | No | Oct 2026 | |
| 7 |  | Free | — | No | Yes | Oct 2026 | |
| 8 |  | Free | 4.2★ (2.6K) | Yes | Yes | Oct 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 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 functions as a digital measuring tool, allowing you to measure objects and distances with accuracy. It also enables you to create sketches with text annotations and share your measurements and designs.
