With an average user rating of 3.9★, the image measurement category is one of the App Store's strongest. Browse all 250+ apps we track, sorted so the most loved ones surface first.
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.
Quickly tag and annotate dimensions, angles, and shapes on your photos. Streamline decoration and measurement tasks with efficient project saving and export options. Enhance your workflow with various annotation tools and integration capabilities.
What We Love
✏️ Annotation tools available for free
👍 User-friendly interface for adding measurements to photos
🎨 Multiple annotation styles to choose from
✨ No watermark on edited images
Room to Improve
😞 Misleading app name and false advertising
❌ Does not actually measure or calculate distances automatically
💰 Requires full year VIP subscription with no trial period
Measure distances, heights, and widths of objects using your device's camera. This app utilizes augmented reality and your device's tilt angle to provide on-screen measurements. It's intuitive for various uses, from measuring buildings to aiding in golf.
What are the best image measurement apps for iPhone?
Image Ruler - Measures tops our image measurement apps ranking as of August 2026, with a 1.5-star average from 44 App Store ratings, and it's free to download.
Are there free image measurement apps for iPhone?
Yes — 20 of the top image measurement apps we rank are free to download, including Image Ruler - Measures and Photos Measure - Image meter.
Does Image Ruler - Measures have ads or in-app purchases?
Image Ruler - Measures has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
How many image measurement apps are on the App Store?
We track 250+ image measurement apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
How accurate are the measurements taken with Image Ruler?
Measurements taken with Image Ruler are estimates. The app's accuracy depends on factors like ensuring the object of known length and the object to be measured are in the same plane and the camera is parallel to them to avoid distortion.
What devices is Image Ruler compatible with?
Image Ruler is supported on iPhone, iPad, and iPod devices. It is designed to work across Apple's mobile ecosystem.