# Digital Ruler Pro — cm & inch measuring tool

> cm & inch measuring tool (iPhone/iPad app by 学友 刘.)

- Source: https://appshunter.io/ios/app/digital-ruler-pro/id6814484613 (this page in markdown: same URL + `.md`)
- Developer: [学友 刘](https://appshunter.io/developer/1895323694)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 6 MB
- Languages: American English, Arabic, French (France), German (Germany), Japanese, Korean, European Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-09-24
- Data updated: 2026-10-03
- User reviews in markdown: https://appshunter.io/ios/app/digital-ruler-pro/id6814484613/reviews.md

## What is Digital Ruler Pro?

Turn your iPhone into a precise digital ruler. Measure any object in seconds — in centimeters or inches, with no internet connection required.

KEY FEATURES
• Linear Ruler — accurate cm and inch measurement with a draggable pointer
• 2D Measurement — measure length and width at the same time
• Device Calibration — calibrate with a credit card, ID card or A4 paper so results stay reliable on any screen
• Measurement History — save, review and manage every reading
• Lock Mode — freeze the current reading and take a clean screenshot

HOW IT WORKS
1. Calibrate once with a standard object (a credit card works great)
2. Place the object you want to measure on the screen
3. Drag the pointer to the edge and read the result instantly

DIGITAL RULER PRO
Unlock everything with a single one-time purchase — no subscription, no auto-renewal:
• Additional calibration objects (ID card, A4 paper)
• Unlimited measurement history
• Advanced export with watermark control
• Enhanced sharing options

Already purchased Pro? Tap "Restore Purchases" on the upgrade screen.

PERFECT FOR
Home DIY, crafts, sewing, education, furniture checks, package sizing and professional field work — a ruler is always in your pocket.

ACCURACY TIP
A screen ruler is most accurate after calibration. For best results, calibrate once per device and keep the phone flat and steady while reading.

PRIVACY
All measurements and settings are stored locally on your device. We do not collect, transmit or share your personal data. No analytics, no ads, no tracking. No internet connection required.

Privacy Policy: https://digitalrulerprivacypolicy.vercel.app/
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro | $9.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-25

No release notes.

## More apps by 学友 刘

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- [Sound Meter Env](https://appshunter.io/ios/app/sound-meter-env/id6768058237)
- [GPSSpeed — Speedometer](https://appshunter.io/ios/app/gpsspeed-speedometer/id6772533638)
- [Smart Digital Compass](https://appshunter.io/ios/app/smart-digital-compass/id6775931397)
- [Metal Detector - Field Scanner](https://appshunter.io/ios/app/metal-detector-field-scanner/id6780550327)
- [RoleEcho](https://appshunter.io/ios/app/roleecho/id6795790908)

All apps by 学友 刘: https://appshunter.io/developer/1895323694

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*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 2026-10-03.*