---
title: "Ruler 2.0 - inch, mm, cm - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Ruler 2.0 - ruler app for high measurement accuracy on the iPhone and iPad. Accurate, exact, precise, precision, correct, true, easy to use and free - these are the words that can describe this ruler "
---

# Ruler 2.0 - inch, mm, cm — United States
> High measurement accuracy

![Ruler 2.0 App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/e4/13/da/e413dacc-7fa9-3955-db4c-378472a169b8/AppIcon-0-0-1x_U007emarketing-0-8-0-0-85-220.png/434x0w.png)

**Developer:** [Oleg Osipov](https://apptail.io/developer/oleg-osipov-TDqc) (Russia)
**Category:** Utilities
**Rating:** 3.9/5 (205 ratings)
**Price:** Free
**Bundle ID:** OsipovOleg333.Ruler2
**Store:** Apple App Store
**Country:** United States
**Version:** 2.0.8 (released 2025-11-14)
**Original Release:** 2018-02-13
**Languages:** English, Russian

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1345983397)
**AppTail Page:** [https://apptail.io/app/ruler-20-inch-mm-cm-wZK/united-states](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/united-states)

## Ruler 2.0 Description
Ruler 2.0 - ruler app for high measurement accuracy on the iPhone and iPad. Accurate, exact, precise, precision, correct, true, easy to use and free - these are the words that can describe this ruler app the best way.

  - Save the measurement as a photo
  - 3 colors of the ruler for your comfort
  - Centimeters, millimeters or inches
  - Measure the length only or width and length at the same time

Tap on the measurement result to change it manually.
Pan with two fingers anywhere on the screen for even higher accuracy.

Measure every length and width with precision on-screen Ruler 2.0. Choose your preferred units of measurement - inches (inch), centimeters (cm) or millimeters (mm). Metric and Imperial systems are supported. Use on-screen ruler as you wish. Tap "Save" button to save the result to the Camera Roll of your device.

## Ruler 2.0 Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/ce/7b/bb/ce7bbbc2-a72d-9c2d-4c12-ab8c603e3ea1/pr_source.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/d4/16/30/d41630f9-27d6-9b14-d1be-9c5d0ff04383/pr_source.png/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/a9/50/d3/a950d39a-1052-19bd-820f-d2e9b13c5edb/pr_source.png/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/61/16/de/6116de16-b0f4-607e-1c6a-3d0f6318cdc0/pr_source.png/1242x2688.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/6f/93/b9/6f93b9a1-91fb-79eb-7a4e-e404cba1d527/pr_source.png/1242x2688.png)

## Ruler 2.0 Rating Breakdown in United States
- 5 stars: 131 (64%)
- 4 stars: 15 (7%)
- 3 stars: 9 (4%)
- 2 stars: 10 (5%)
- 1 stars: 40 (20%)

## Ruler 2.0 Reviews in United States

### **--- "Sizing is off for newer, larger phones (high dpi)"
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
-- LouBaby1911, 2025-05-18

### *---- "wrong scale in iphone16"
hi
wrong dimension measurement on iphone16
please solve
-- Ali Asghari, 2025-04-13

### *---- "Maybe it used to work, but it seems out of date."
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.
-- Matt7668478, 2024-10-09

### *---- "Doesn’t work on iPhone 15 Pro Max"
It used to be accurate on my iPhone 12 Pro Max but the measurements are too small on my iPhone 15 Pro Max.
-- Romain Guimard, 2024-06-14

### **--- "Great if the sizes were correct"
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.
-- Andrew 47, 2024-06-11

### *---- "It is wrong measurements"
Sad to say the mm readings are off.
-- someguywest, 2024-05-03

### ****- "Wish it worked on iPhone SE"
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.
-- PugSnot, 2023-12-27

### **--- "Doesn’t work on iPhone 15 plus"
Worked fine on 12 plus. Miscalibrated on 15. Probably a resolution change that needs to be checked for in software.
-- Offline or it didn't happen, 2023-12-08

### *---- "Not working on 15 Pro Max!"
It is useless as all the measurements are wrong on an iPhone 15 Pro Max!
-- Alfamonk, 2023-11-12

### *---- "Inaccurate"
The “inches” in this app are WAY too small.
-- Azcac, 2023-09-29

### *---- "Not even close"
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.
-- DJ'er, 2023-09-22

### *---- "Not accurate measurement"
Not accurate measurement
-- Large Minion, 2023-09-04

### *---- "Unfortunately not accurate for me"
Unfortunately, this app was not at all accurate for me. I tried another app (Ruler 2023), and it worked wonderfully.
-- Mike (iOS is up to date), 2023-08-10

### *---- "Used to work perfectly"
Not accurate on iPad Pro or iPhone 13 Pro Max
-- plumjm, 2023-05-13

### *---- "Inaccurate, needs update"
Measurements are way off on my iPhone 14. Hope they update bc otherwise it looks like it would be a useful app!
-- 1847aap, 2023-01-19

### *---- "Way off on iPhone 13 Pro"
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.
-- tjh, 2023-01-15

### ***-- "50mm shows as ~72mm"
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.
-- Pocketology, 2023-01-10

### ****- "Excellent app, please remove shadow"
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!
-- jmgm08, 2022-12-13

### *---- "Not accurate at all"
The last update was 2 years ago. It had been accurate until I switched to an iPhone 14. Now it’s useless.
-- Indigo Wombat, 2022-11-26

### *---- "Wrong grid on iPhone SE 2022"
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.
-- JustARandomDmitry, 2022-09-29

[View all Ruler 2.0 reviews and detailed analytics on AppTail](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=reviews)



## Ruler 2.0 Discovered Keywords
- cm
- inch
- millimeter ruler
- ruler app mm
- ruler cm
- metric ruler
- mm
- mm ruler

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## Ruler 2.0 Available In
- [United States](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/united-states)
- [Russia](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/russia)
- [United Kingdom](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/united-kingdom)
- [Canada](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/canada)
- [Ukraine](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/ukraine)
- [Australia](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/australia)
- [Thailand](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/thailand)
- [India](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/india)
- [Singapore](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/singapore)
- [Argentina](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/argentina)
- [Taiwan](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/taiwan)
- [Mexico](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/mexico)
- [Cyprus](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/cyprus)
- [Belarus](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/belarus)
- [Norway](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/norway)
- [United Arab Emirates](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/united-arab-emirates)
- [Indonesia](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/indonesia)
- [Israel](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/israel)
- [Iceland](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/iceland)
- [Japan](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/japan)
- [Kenya](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/kenya)
- [South Korea](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/south-korea)
- [Kuwait](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/kuwait)
- [Cayman Islands](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/cayman-islands)
- [Kazakhstan](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/kazakhstan)
- [Lebanon](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/lebanon)
- [Luxembourg](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/luxembourg)
- [Mauritius](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/mauritius)
- [Malaysia](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/malaysia)
- [Nigeria](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/nigeria)
- [New Zealand](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/new-zealand)
- [Oman](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/oman)
- [Peru](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/peru)
- [Philippines](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/philippines)
- [Pakistan](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/pakistan)
- [Saudi Arabia](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/saudi-arabia)
- [Türkiye](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/turkey)
- [Uzbekistan](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/uzbekistan)
- [Vietnam](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/vietnam)
- [South Africa](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/south-africa)
- [Armenia](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/armenia)
- [Azerbaijan](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/azerbaijan)
- [Belgium](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/belgium)
- [Brazil](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/brazil)
- [Switzerland](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/switzerland)
- [Chile](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/chile)
- [China](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/china)
- [Colombia](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/colombia)
- [Dominican Republic](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/dominican-republic)
- [Algeria](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/algeria)
- [Ecuador](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/ecuador)
- [Egypt](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/egypt)
- [Spain](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/spain)
- [France](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/france)
- [Hong Kong SAR China](https://apptail.io/app/ruler-20-inch-mm-cm-wZK/hong-kong)

---

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