Comparison

OrthoMeasure vs JustRuler

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Precise angle measurement
  • Simple 2-tap system
  • Visual angle display
  • Full angle display (acute, obtuse, reflex)
  • Clean, dark-mode interface
  • Uses device motion sensors
Features
Read full description

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.

About

JustRuler

Features
Read full description

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

OrthoMeasure3 screens
JustRuler4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. JustRuler sells 1 one-off in-app purchase. OrthoMeasure asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
OrthoMeasure versus JustRuler: the parameters behind the verdict, then further details
ParameterOrthoMeasureJustRuler
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 5 days — betterEvery 6 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS17.6 — better26.2
Further details — not scored
Size3 MB5 MB
Age rating12+4+
DeveloperHadi Altabatabaaeatsuko imai

In-app purchases

None

OrthoMeasure

No in-app purchases

1 purchases

JustRuler

One-time1
  • Remove Ads$0.99

Questions

Is OrthoMeasure free?
OrthoMeasure is free to download, with no in-app purchases.
Is JustRuler free?
JustRuler is free to download, with in-app purchases available.
Do OrthoMeasure or JustRuler have ads?
JustRuler shows ads; OrthoMeasure does not.
Which is updated more often, OrthoMeasure or JustRuler?
OrthoMeasure ships an update every 5 days, and JustRuler every 6 weeks. Most recently, OrthoMeasure was updated on October 24, 2026 and JustRuler on October 25, 2026.

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