# Ruler - Ultra Precise — Ad-free, Ultra Precision

> Lightweight, ad-free digital ruler for precise length measurement. (iPhone/iPad app by 之宇 毛.)

- Source: https://appshunter.io/ios/app/ruler-ultra-precise/id1516143021 (this page in markdown: same URL + `.md`)
- Developer: [之宇 毛](https://appshunter.io/developer/1516142419)
- Category: Productivity
- Price: $0.99 (on sale, was $4.99)
- Rating: 4.25/5 from 4 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 1 MB
- Languages: English
- Released: 2020-06-10
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/ruler-ultra-precise/id1516143021/reviews.md

## What is Ruler?

Ruler is a super lightweight (less than 1MB) length measuring tool.

Features:
* Use sliders to get the accurate length data in centimeters and inches at the same time
* Switch to Dark Mode automatically with your system settings, so it won’t hurt your eyes at night :)

Welcome to make comments to help me improve the app.
Thanks!

## Key features

- Precise length measurement
- Supports centimeters and inches
- Lightweight (under 1MB)
- Automatic dark mode switching
- Ad-free experience

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/ruler-ultra-precise/id1516143021/reviews.md

### 2/5 — Wrong calibration on 16 Pro

*2025-01-20*

Measurements are off

### 5/5 — No ads! 🎉

*2023-03-31*

Amazing and simple app. Thank you

### 1/5 — Not accurate at all on iPhone 14

*2023-02-24*

120mm on the app is actually 119mm.

### 5/5 — Simple, no ads

*2022-09-09*

It works, nice and clean

### 5/5 — Accurate on iPhone 13 Pro Max

*2021-12-08*

Finally found a ruler app that gives an accurate ruler measure on an iPhone 13 Pro Max, and I’m even using zoom mode on my iPhone, too.  So many other ruler Apps give a completely inaccurate ruler measurement, at least on my iPhone 13 Pro Max.

## Frequently asked questions about Ruler

### What is Ruler - Ultra Precise used for?

Ruler - Ultra Precise is a digital tool designed for measuring lengths with high accuracy. It allows users to measure in both centimeters and inches simultaneously, making it versatile for various needs.

### How accurate is Ruler - Ultra Precise?

The app is designed for ultra-precise measurements, utilizing sliders to ensure accurate length data. While the exact precision depends on the device's capabilities, it aims to provide reliable measurements.

### Does Ruler - Ultra Precise have ads?

No, Ruler - Ultra Precise is an ad-free application. This ensures an uninterrupted and focused user experience without any advertisements.

### What is the price of Ruler - Ultra Precise?

Ruler - Ultra Precise is available for a one-time purchase of $0.99. This grants you full access to its features without any recurring costs.

### What devices is Ruler - Ultra Precise compatible with?

Ruler - Ultra Precise is compatible with iPhones, iPads, and iPods. It is designed to work across various iOS devices.

### How often is Ruler - Ultra Precise updated?

The app was last updated on September 18, 2024, with version 2.2. This indicates a commitment to maintenance and potential improvements.

### What is the age rating for Ruler - Ultra Precise?

Ruler - Ultra Precise has an age rating of 4+. This means it is suitable for children aged 4 and above, offering a simple and safe utility.

### Can Ruler - Ultra Precise measure in both cm and inches?

Yes, Ruler - Ultra Precise allows you to get accurate length data in centimeters and inches at the same time. This dual unit support enhances its usability for a wider range of users.

## Version history (last 5 releases)

### 2.2 — 2024-09-18

Update for new iPhone

### 2.1 — 2023-11-11

iPhone 15 Support

### 2.0 — 2022-11-13

New iPad Support

### 1.9 — 2022-09-23

Localization for most languages.

### 1.8 — 2022-09-16

Compatible with iPhone 14, 14 Plus, 14 Pro and 14 Pro Max.

## Apps similar to Ruler

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Ruler Pro - Measuring Tape](https://appshunter.io/ios/app/ruler-pro-measuring-tape/id1497431339) | 4.0 (8) | $1.99 | Productivity |
| [Measuring Tape, Photo Ruler](https://appshunter.io/ios/app/measuring-tape-photo-ruler/id1020133524) | 4.2 (2,566) | Free | Productivity |
| [AR Ruler: Digital Tape Measure](https://appshunter.io/ios/app/ar-ruler-digital-tape-measure/id1326773975) | 4.7 (943) | Free | Productivity |
| [Pro Ruler - Measuring Tape](https://appshunter.io/ios/app/pro-ruler-measuring-tape/id1541122485) | 4.2 (155) | Free | Productivity |
| [3D Snap: LiDAR Scanner & Ruler](https://appshunter.io/ios/app/3d-snap-lidar-scanner-and-ruler/id6477467417) | 4.1 (81) | Free | Productivity |
| [MyTools · My AR Ruler & Light](https://appshunter.io/ios/app/mytools-my-ar-ruler-and-light/id557839389) | 4.4 (91) | Free | Productivity |

---

*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 2026-06-10.*