# Ruler 2.0 - inch, mm, cm — user reviews > 71 indexed App Store user reviews of Ruler 2.0 by Oleg Osipov, rated 3.90/5 from 205 ratings. - Source: https://appshunter.io/ios/app/ruler-20-inch-mm-cm/id1345983397/reviews - App overview in markdown: https://appshunter.io/ios/app/ruler-20-inch-mm-cm/id1345983397.md - Rating breakdown: 5★ 131 · 4★ 15 · 3★ 9 · 2★ 10 · 1★ 40 ## What do users think of Ruler 2.0? Overall sentiment: negative **Pros** - 👍 Simple and easy to use - 💡 Precise measurements (when working) - ✨ Free with no ads - ✅ Lightweight and small size - 🎯 Good for small item measurements **Cons** - 🐛 Frequent crashes - 📏 Inaccurate measurements on newer phones - 📱 Not optimized for high DPI screens - 📉 Scale is off by ~50% on newer models - ⚠️ Support link is shady **Commonly reported bugs** - Crashes after a few seconds - Keeps crashing - Wrong scale/dimension measurement on newer iPhones (13, 14, 15 series, SE 2022) - Inches are too small (e.g., 1cm shows as smaller than 4mm) - Measurements are off by about half - Screen scale wrong (1cm showing smaller than 4mm) - Grid is shrunk on newer iPhones - App frequently corrects '20' to '2.0' **Most requested features** - Update for newer iPhone displays (high DPI) - Manual adjustment for screen size/resolution - Add option to manually enter dimensions - Add inch fractions as measurement option - Allow adjustable text font size when saving - Implement lighter background option (plain white) - Make the measuring line not reset based on finger position ## Newest reviews (19 of 71) ### 2/5 — Sizing is off for newer, larger phones (high dpi) *2025-05-18, version 2.0.7* This app was a very good app, but it’s completely unusable now if you’ve got a large max phone, I think it’s the high dpi screen that makes the inches way too small. The inches are about the size of a centimeter in this app. It needs to be updated to support high DPI large phones ### 2/5 — Great if the sizes were correct *2024-06-11, version 2.0.7* The settings and features are exactly what I’d want in a ruler app, but on the 15 pro max, it’s showing the screen size as 5.5 by 10.8 inches. Five stars if it’s updated to correctly detect the screen size or just a settings page where you can manually enter what the X and Y maxes should be. ### 4/5 — Wish it worked on iPhone SE *2023-12-27, version 2.0.7* This worked fine on my iPhone XR but does not work correctly on my new iPhone SE. the scaling is off. wish it would get a fix because it's the best measure app of this kind. ### 2/5 — Doesn’t work on iPhone 15 plus *2023-12-08, version 2.0.7* Worked fine on 12 plus. Miscalibrated on 15. Probably a resolution change that needs to be checked for in software. ### 1/5 — Not even close *2023-09-22, version 2.0.7* Used to be good. Now using iPhone 14 max and one inch is not even close to one inch. Looks like app was designed for one size of iPhone screen and does not scale for other models. ### 1/5 — Not accurate measurement *2023-09-04, version 2.0.7* Not accurate measurement ### 1/5 — Unfortunately not accurate for me *2023-08-10, version 2.0.7* Unfortunately, this app was not at all accurate for me. I tried another app (Ruler 2023), and it worked wonderfully. ### 1/5 — Used to work perfectly *2023-05-13, version 2.0.7* Not accurate on iPad Pro or iPhone 13 Pro Max ### 1/5 — Inaccurate, needs update *2023-01-19, version 2.0.7* Measurements are way off on my iPhone 14. Hope they update bc otherwise it looks like it would be a useful app! ### 1/5 — Way off on iPhone 13 Pro *2023-01-15, version 2.0.7* Completely inaccurate on iPhone 13 Pro. Dimensions run nearly half their true size (e.g. “1 inch” in the app is closer to 0.5 inches in the real world). Looks as though the developer is not correctly converting pixels to physical dimensions. ### 3/5 — 50mm shows as ~72mm *2023-01-10, version 2.0.7* Have loved this app for years with my iPhone SE 1st gen 2016 but the grid is shrunk on iPhone SE 3 2020 with a larger screen so that actual 50mm for example reads as approximately 72mm. The whole app is now about 30% off accuracy and unfortunately it is now unusable. Would be grateful for an update to be compatible with more current devices. ### 4/5 — Excellent app, please remove shadow *2022-12-12, version 2.0.7* Hi I enjoy your app very much. It’s really useful. The only qualms I have are that the shadow/outline effect under the measuring line nakes it hard to make precise readings. It would also be really nice if the line didn’t reset based on your finger’s position on the screen. Thanks! ### 1/5 — Not accurate at all *2022-11-25, version 2.0.7* The last update was 2 years ago. It had been accurate until I switched to an iPhone 14. Now it’s useless. ### 1/5 — Wrong grid on iPhone SE 2022 *2022-09-29, version 2.0.7* On iPhone SE 2022, the grid is small and shows 14.8 cm in screen length, while in actuality it is about 10 cm. Please fix this. ### 1/5 — Не оптимизирована под экран *2022-08-16, version 2.0.7* iPhone 13pro показывает расстояние около 1,5 см, как 4,5 см. ### 3/5 — Loved. I want to love again *2022-08-15, version 2.0.7* This was the only ruler app I would use it was my all-time favorite and I’ve been through a lot but now with my iPhone 13, nope. Measurements are wrong so I’m just hoping hoping hoping that it will get fixed cause if not deleting, unfortunately. ### 1/5 — Measurements completely wrong on iPhone 13 *2022-08-02, version 2.0.7* Measurement scale is completely incorrect on iPhone 13. Possible relation to screen resolution. App is useless on these models. ### 3/5 — Sizes distorted on iPhone 13 *2022-07-15, version 2.0.7* This app needs to be updated so it works with the newer phones. Sizes are off ### 1/5 — What use is a ruler that isn’t accurate? *2022-06-18, version 2.0.7* Doesn’t work on 13 pro max. Inches are about 1.5cm and centimeters are about 3mm. Worthless garbage. ## Most critical reviews (10 lowest-rated) ### 1/5 — Shame *2025-06-06, version 2.0.7* Crashes after a few seconds 🫤 ### 1/5 — wrong scale in iphone16 *2025-04-13, version 2.0.7* hi wrong dimension measurement on iphone16 please solve ### 1/5 — Keeps crashing *2025-01-11, version 2.0.7* Would be just what I want if it stayed open long enough to see. Pity. Been like this for ages so no use whatsoever ### 1/5 — Screen scale wrong *2024-10-17, version 2.0.7* Needs updating for newer iPhone displays as 1cm is showing smaller that 4mm. ### 1/5 — Maybe it used to work, but it seems out of date. *2024-10-09, version 2.0.7* It’s not accurate, by about half of whatever unit of measurement your trying to check. Can’t find anywhere in the settings to adjust for screen size or anything. When I tapped the “support” button here in the App Store, it took me to a shady link: apple security said it was someone imitating a legit website.:. So that should tell you everything. ### 1/5 — Doesn’t work on iPhone 15 Pro Max *2024-06-14, version 2.0.7* It used to be accurate on my iPhone 12 Pro Max but the measurements are too small on my iPhone 15 Pro Max. ### 1/5 — It is wrong measurements *2024-05-03, version 2.0.7* Sad to say the mm readings are off. ### 1/5 — Неправильные размеры *2024-01-19, version 2.0.7* Показывает 3 см, а в реальности это 1.5 см. Пофиксите этот момент плиз. ### 1/5 — Not working on 15 Pro Max! *2023-11-12, version 2.0.7* It is useless as all the measurements are wrong on an iPhone 15 Pro Max! ### 1/5 — Inaccurate *2023-09-29, version 2.0.7* The “inches” in this app are WAY too small. ## Most praised reviews (10 highest-rated) ### 5/5 — tip mm *2023-11-22, version 2.0.7* I needed to measure a 1mm tip and I achieved it perfectly. ### 5/5 — Easy, helpful, and nice functionality *2021-10-13, version 2.0.7* Super easy to use. Perfect for measuring and cutting to get the perfect Visa or Passport photo requirements. ### 5/5 — Mmlmm *2021-06-26, version 2.0.7* K k k ### 5/5 — Great *2020-11-27, version 2.0.7* Use it for jewelry and can highly recommend ### 5/5 — Ruler *2020-11-05, version 2.0.7* This ruler app is fabulous. I use it a lot to measure small things in particular. Beads, cords, anything I use in my crafting that needs a quick measure. ### 5/5 — Свою функцию выполняет *2020-08-17, version 2.0.5* Спасибо ### 5/5 — Полезно *2020-05-16, version 2.0.5* Не врёт, проверял👍🏻 ### 5/5 — Отлично *2020-05-08, version 2.0.5* Хорошее приложение, ноль не скрыт за изгибами смартфона. Автор молодец ### 5/5 — Best ruler app out there 👍 *2019-11-06, version 2.0.5* This app has one function I’ve been wanting but could not find in other ruler apps - being able to input digits and have exact measurement appear on screen, brilliant ! The app is very light weight (small size), easy to use and functions perfectly. Must mention as well, it is free and no ad’s to be found, impressive ! Really handy to have, perfect for checking the size of small items you’re shopping for online, but need visual of the size - this app will show you the size in seconds, as long as it’s not bigger than your screen dimensions, obviously ! Big thanks to developer for this app ! 👍👍 ————— In future releases, some extra features could be implemented: Adding hundredths after decimal point, not just tenths. If you type in for example 4.77cm app shows the shape at exactly 4.77cm, but the number displayed at the bottom of screen is rounded to 4.8cm - Just add a second digit after decimal point, shapes already appear in correct size, only the hundredths digit is not there. Another request would be to implement even lighter background, like plain white (and no grid), as an option, so that the shape would stand out even more. Last, but not least - the feature to add text when saving the picture is great, but text font size needs to be smaller or ideally adjustable size (pinch gesture) and icing on the cake would be, if it was moveable (drag with finger). These are just few additions to think about, otherwise app is already well thought out and executed ✅ ### 5/5 — Great app *2019-08-08, version 2.0.4* Useful, simple and well thought-out. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*