249+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our digital pd ruler list covers 249+ iPhone apps updated through September 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.8★ (22K) | No | No | Oct 2026 | |
| 2 |  | Free | 4.3★ (35K) | No | Yes | Oct 2026 | |
| 3 |  | Free | — | No | No | Aug 2026 | |
| 4 |  | Free | — | — | No | Sep 2026 | |
| 5 |  | Free | 4.2★ (413) | Yes | No | Oct 2026 | |
| 6 |  | Free | — | No | Yes | Aug 2026 | |
| 7 |  | Free | — | Yes | Yes | Oct 2026 | |
| 8 |  | Free | 1.0★ (3) | No | No | Aug 2026 |
Transform your iPhone into a precise 3D scanner for measuring pupillary distance and segment height. Get accurate measurements for ordering prescription glasses online with confidence, eliminating the need for manual 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.
