# TouchCaliper Ruler & Caliper — On-screen ruler & caliper

> On-screen ruler & caliper (iPhone/iPad app by Shuhei Yamamoto.)

- Source: https://appshunter.io/ios/app/touchcaliper-ruler-and-caliper/id6777427980 (this page in markdown: same URL + `.md`)
- Developer: [Shuhei Yamamoto](https://appshunter.io/developer/1896725589)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 1 MB
- Languages: American English, Japanese, Chinese (Simplified, China)
- Released: 2026-06-09
- Data updated: 2026-09-03
- User reviews in markdown: https://appshunter.io/ios/app/touchcaliper-ruler-and-caliper/id6777427980/reviews.md

## What is TouchCaliper Ruler & Caliper?

Turn your iPhone into a real-size ruler and caliper. When you don't have a ruler handy, just lay a small object on the screen and pinch it between the two bars - the size is shown in millimetres, big and clear.

Great for screws, buttons, batteries, SD cards, sticky notes and other small things.

Features
- Real-size mm grid (horizontal & vertical)
- Two measuring bars with a big millimetre readout
- Switch between width and height
- Auto-scaled from your device's screen; if it's ever off, calibrate in one tap against a credit card or coin

How to use
1. Tap Measure
2. Place an object on the screen
3. Align the two bars to its edges
4. Read the big number

Pro (one-time purchase)
- Exact 0.1 mm readout (the free version reads to the whole millimetre)
- Inches & fractional inches (to the nearest 1/64, shown together with cm)
- Share / save the result as an image
- Measurement history with labels
The grid, calibration and whole-millimetre measuring are always free.

Notes
- Only objects that fit on the screen can be measured.
- Measures flat dimensions (width, diameter, length).
- Objects rest directly on the screen - take care not to scratch it.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| TouchCaliper Pro | $2.99 | one-time |



## Version history (last 5 releases)

### 1.2.1 — 2026-08-29

- Added Simplified Chinese
- Minor improvements

### 1.2.0 — 2026-08-11

- New: inches & fractional inches (Pro) — read 1 11/16" to the nearest 1/64, with mm and cm shown at the same time
- Improved paywall: you can now retry when offline
- The whole app is now fully localised in English
- The free readout now shows whole millimetres (the grid, calibration and measuring stay free; existing users keep the 0.1 mm readout for free)

### 1.1.1 — 2026-07-19

The feedback form now arrives pre-filled with your app version, so reporting an issue takes less typing.

### 1.1 — 2026-06-30

• The feedback form now auto-fills the app name and version
• Minor improvements

### 1.0 — 2026-06-10

No release notes.

## Apps similar to TouchCaliper Ruler & Caliper

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [NEC Box & Conduit Calc](https://appshunter.io/ios/app/nec-box-and-conduit-calc/id6755513987) | 4.9 (19) | Free | Utilities |
| [Super Ruler](https://appshunter.io/ios/app/super-ruler/id1182697242) | — | Free | Utilities |
| [Kaliper](https://appshunter.io/ios/app/kaliper/id1469528726) | 4.6 (8) | Free | Utilities |
| [Caliper&Ruler](https://appshunter.io/ios/app/caliper-and-ruler/id6749051381) | 5.0 (1) | Free | Utilities |
| [CountdownEvents: Widgets](https://appshunter.io/ios/app/countdownevents-widgets/id6759694899) | — | Free | Utilities |
| [Ruler - Screen accurate ruler](https://appshunter.io/ios/app/ruler-screen-accurate-ruler/id6746461013) | — | Free | Utilities |

## More apps by Shuhei Yamamoto

- [Snug Video](https://appshunter.io/ios/app/snug-video/id6770224390)
- [MixMaster: Miniature Paint Mix](https://appshunter.io/ios/app/mixmaster-miniature-paint-mix/id6772663734)
- [ColorOverlay 色合わせ・パーソナルカラー](https://appshunter.io/ios/app/coloroverlay/id6777666455)
- [FormLapse](https://appshunter.io/ios/app/formlapse/id6780141102)
- [BaroFocus 気圧変化アラート](https://appshunter.io/ios/app/barofocus/id6784957777)

All apps by Shuhei Yamamoto: https://appshunter.io/developer/1896725589

---

*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 2026-09-03.*