# Ruler: On Screen Tape Measure — Protractor, Level, Converter

> Calibrated on-screen ruler, protractor, level, and unit converter. (iPhone/iPad app by Phuc Pham.)

- Source: https://appshunter.io/ios/app/ruler-on-screen-tape-measure/id6772275569 (this page in markdown: same URL + `.md`)
- Developer: [Phuc Pham](https://appshunter.io/developer/1893081423)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 10 MB
- Languages: American English
- Released: 2026-05-28
- Data updated: 2026-09-08
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/ruler-on-screen-tape-measure/id6772275569/reviews.md

## What is Ruler?

Need to measure something right now and there is no tape measure in sight? RulerTape turns your iPhone screen into a calibrated ruler. Lay a screw, coin, cable, key or charm on the display, drag the two guides to its edges, and read the size in centimeters, millimeters or inches.

Most screen rulers guess your device size and hand you a number that is quietly wrong. RulerTape has you calibrate once against a bank card or coin you already own, stores that factor, and applies it to every tool in the app. And it does not stop at a ruler: a drag-anywhere tape canvas, a protractor with a rotating set square, a bubble level driven by the motion sensors, and a length converter all read from the same calibration. Everything runs offline on the device — no camera, no account, no connection.

WHAT YOU GET
- Read the exact size of small parts in cm, mm or inches without hunting for a tape measure
- Trust the number, because you calibrated the scale against a real card once
- Measure length, area, height and tilt on one drag canvas, then lock the reading so it cannot slip
- Check any angle with the protractor and set square, or square up a shelf with the bubble level
- Convert mm, cm, m, km, inches, feet, yards and miles without leaving the app
- Keep useful sizes in history, star the ones you reuse, and pull them back up later

PERFECT FOR
- DIY and home repair: screws, bolts, washers, drill bits, hardware you have to match
- Crafters, jewelers and hobbyists sizing beads, findings, yarn, model parts
- Shoppers checking whether a listed dimension really fits the shelf or the wrist
- Students and makers who need an angle, a level line or a fast unit conversion

WHY NOT JUST USE A REAL TAPE MEASURE
Because yours is in the other room and the thing in your hand is 18 mm wide. A screen ruler wins on small objects you can physically rest on the glass, and it is always in your pocket. For anything longer than the display, the tape canvas and the converter carry the job. We will say it plainly: readings are calibrated approximations built for fast everyday sizing, not for machining tolerances.

PRIVACY
Measurements, favorites and your calibration factor stay in the app on your device. No account, no sign-up, no tracking profile, no ads. It all works with airplane mode on.

FULL ACCESS
Full access unlocks every tool with no limits: the calibrated on-screen ruler, the tape canvas with length, area and height modes, the protractor and set square, the bubble level, the unit converter, the common-object size reference and saved history. Offered as a weekly subscription, a yearly subscription, or a one-time lifetime purchase. Subscriptions renew automatically until cancelled in your Apple Account settings; the lifetime option is paid once.

Calibrate against a card in under a minute, then measure the next small thing you pick up.

Terms of Use (EULA): https://web-levi.web.app/terms
Privacy Policy: https://web-levi.web.app/privacy-policy
Questions? tphuc.work@gmail.com

## Key features

- Calibrated on-screen ruler
- Protractor with set square
- Bubble level
- Unit converter
- Tape canvas for length and area
- Saved history for measurements

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/ruler-on-screen-tape-measure/id6772275569/reviews.md

### 1/5 — No Trial or free version.

*2026-09-03*

You will be asked to pay once you download the app. There is no free tool that use can use. Not even once.

## Frequently asked questions about Ruler

### How accurate is Ruler?

Ruler provides calibrated approximations for fast everyday sizing. Accuracy is enhanced by calibrating the scale against a real card or coin once. Readings are not intended for machining tolerances.

### Does Ruler have ads?

No, Ruler does not have ads. The developer explicitly states that there are no ads, and all measurements and data stay on the device.

### What devices does Ruler support?

Ruler is currently supported on iPhones. The app utilizes the device's motion sensors for features like the bubble level.

### How do I calibrate Ruler?

Calibration involves placing a bank card or coin on the screen and following the on-screen instructions. This process takes under a minute and ensures accurate measurements for all tools within the app.

### Can I use Ruler offline?

Yes, Ruler is designed to work entirely offline on the device. It does not require a camera, account, or internet connection to function.

### What is the age rating for Ruler?

Ruler has an age rating of 4+. This indicates it is suitable for children and adults, with no mature content.

### How often is Ruler updated?

The latest version is 1.1.1, last updated on August 15, 2026. While specific update frequency isn't detailed, this indicates active development.

### What are the full access options for Ruler?

Full access unlocks all tools without limits, including the calibrated ruler, tape canvas, protractor, bubble level, and unit converter. This is offered via weekly subscription, yearly subscription, or a one-time lifetime purchase.

## Version history (last 3 releases)

### 1.1.1 — 2026-08-15

Bug fixes and performance improvements.

### 1.1.0 — 2026-07-25

Introducing Premium with new features. Plus bug fixes and improvements.

### 1.0 — 2026-05-28

No release notes.

## Apps similar to Ruler

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Ruler - Screen accurate ruler](https://appshunter.io/ios/app/ruler-screen-accurate-ruler/id6746461013) | — | Free | Utilities |
| [Lorem Ipsum Creator](https://appshunter.io/ios/app/lorem-ipsum-creator/id6753314943) | — | Free | Utilities |
| [OKX Tool](https://appshunter.io/ios/app/okx-tool/id6758982015) | — | Free | Utilities |
| [Life-Size Ruler](https://appshunter.io/ios/app/life-size-ruler/id6503698542) | 3.7 (3) | Free | Utilities |
| [Ruler - Screen Measure Tool](https://appshunter.io/ios/app/ruler-screen-measure-tool/id6757359013) | — | Free | Utilities |
| [Epic Ruler](https://appshunter.io/ios/app/epic-ruler/id982728131) | 1.0 (4) | Free | Utilities |

## More apps by Phuc Pham

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All apps by Phuc Pham: https://appshunter.io/developer/1893081423

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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 2026-09-08.*