JustRuler vs My Screen Protractor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JustRuler
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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
My Screen Protractor
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Measure angles on your screen with a simple touch. No physical protractor needed — get precise angle measurements anytime, anywhere. 【Touch-Based Angle Measurement】 Tap to set the vertex point, then draw two lines by dragging. The angle is calculated automatically. Intuitive controls make it easy for anyone to use. 【Real-Time Angle Display】 See the angle update in real time as you draw. A visual arc and label clearly show the measured angle with one decimal place precision. 【Clean Grid Background】 A grid overlay helps you align lines and better visualize angles at a glance. 【Dark Mode Support】 Switch to dark mode for comfortable use in any lighting condition. 【Multi-Language Support】 Available in 10 languages including English, Korean, Japanese, Chinese, and more. Perfect for architecture, interior design, DIY projects, math homework, blueprint reading, and any moment you need to measure an angle.
Screenshots
Verdict
The clearest difference is in-app purchases: My Screen Protractor at none against JustRuler's 1. My Screen Protractor also leads on device support and iOS requirement (13.0 vs 26.2). On price there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. JustRuler sells 1 one-off in-app purchase. My Screen Protractor asks for nothing beyond the download.
| Parameter | JustRuler | My Screen Protractor |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Weekly |
| Ads | — | No |
| In-app purchases | Yes | No — better |
| Devices | — | iPhone, iPad, iPod — better |
| Requires iOS | 26.2 | 13.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | atsuko imai | mintaek lee |
In-app purchases
JustRuler
- Remove Ads$0.99
My Screen Protractor
No in-app purchases
Questions
Is JustRuler free?
Is My Screen Protractor free?
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