OrthoMeasure vs JustRuler
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OrthoMeasure
Accurately measure clinical angles using your iPhone's motion sensors. This digital goniometer provides precise readings on X-rays or during examinations with a simple two-tap system. Get instant, clear display of all corresponding angles.
- Precise angle measurement
- Simple 2-tap system
- Visual angle display
- Full angle display (acute, obtuse, reflex)
- Clean, dark-mode interface
- Uses device motion sensors
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Measure clinical angles with precision and ease. OrthoMeasure turns your iPhone into a fast, accurate digital goniometer, perfect for measuring angles on X-rays, during clinical examinations, or anywhere you need a reliable reading. Stop guessing or relying on bulky physical tools. OrthoMeasure uses your device's advanced motion sensors to calculate angles with just two simple taps. HOW IT WORKS: Align First Line: Hold your iPhone parallel to the first line (e.g., the top of the spinal curve). Tap to Set: Tap the screen to lock the first angle. Align Second Line: Hold your iPhone parallel to the second line (e.g., the bottom of the curve). Tap to Measure: Tap a final time. OrthoMeasure instantly calculates all four corresponding angles (e.g., 35°, 145°, 215°, 325°) and displays them clearly. FEATURES: High Precision: Uses your device's core motion sensors for accurate, repeatable measurements. Simple 2-Tap System: No complex buttons. Align, tap, align, and tap again. Visual Guide: See the lines you've measured drawn on the screen. Full Angle Display: Instantly get the acute, obtuse, and reflex angles for a complete picture. Clean Interface: A beautiful, dark-mode-friendly interface that stays out of your way. Designed for orthopedic surgeons, chiropractors, physiotherapists, and medical students, OrthoMeasure is the modern, simple way to get the angle you need.
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
Screenshots
Verdict
The clearest difference is in-app purchases: OrthoMeasure at none against JustRuler's 1. OrthoMeasure also leads on ads (none vs shown) and update cadence (every 5 days vs every 6 weeks). On price and device support 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. OrthoMeasure asks for nothing beyond the download.
OrthoMeasure ships an update every 5 days, JustRuler every 6 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | OrthoMeasure | JustRuler |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 days — better | Every 6 weeks |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 3 MB | 5 MB |
| Age rating | 12+ | 4+ |
| Developer | Hadi Altabatabaae | atsuko imai |
In-app purchases
OrthoMeasure
No in-app purchases
JustRuler
- Remove Ads$0.99









