
Free
In-App Purchases
About
JustRuler turns your iPhone screen into a real-size ruler. When you forgot your tape measure but need a quick check on length, angle, or level, this is the one tool to keep handy.
[Key features]
- Real-size ruler mode — Place an object on the screen and read the scale. Toggle cm/inch instantly.
- Two-line measure mode — Pinch an object between the on-screen lines and read the gap to the millimeter.
- Protractor (0°–180°) — Drag the on-screen arm to measure angles. Great for DIY and furniture assembly.
- Spirit level — Lay the device flat and the bubble centers. Hold it vertical for a bar-style level.
- Calibration — Match your real ruler once and every measurement becomes more accurate.
- 5 styles — Classic / Modern / Dark / Metal / Custom Color.
[New in v2.1]
- Sequential measurement: stack multiple segments and read the running total
- Reference mode: set a target value and see the live diff against it
- Voice readout: hear values spoken aloud when your hands are full
- 31 languages supported
[Who it's for]
- DIY and craft enthusiasts
- Anyone who doesn't want to carry a ruler around
- Students, designers, makers
Free with one launch interstitial ad. A one-time $0.99 purchase removes ads forever.
Privacy Policy: https://kazusa703.github.io/privacy.html
Terms of Use: https://kazusa703.github.io/terms.html
Support: https://kazusa703.github.io/support.html
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What's New in JustRuler
2.1
May 11, 2026
v2.1 update [New] - Sequential measure mode: add segments and read the total. - Reference mode: set a target via history or input; live diff with haptic + voice when matched. - Voice readout: speaks values as you drag and save, in your language. - 31 languages supported (was Japanese only). [Other] - Internal optimization and bug fixes. Please let us know what you think via Support.
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In-App Purchases
$0.99
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