Protractor+ vs OrthoMeasure
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Protractor+
Transform your device into a versatile angle measurement tool. Easily measure angles in both degrees and radians with an intuitive interface. Ideal for quick and precise angle readings.
- Angle measurement
- Degrees and radians
- Intuitive visual control
- Elegant design
- Pocket protractor functionality
Read full descriptionHide full description
Protractor helps you to measure angles quickly and easily. This app turn your iPhone into a handy pocket protractor that can measure angles in both degrees and radians. Features: - Elegant design - Measure in degrees and radians - Intuitive visual control
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
Read full descriptionHide 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.
Screenshots
Verdict
The clearest difference is review sentiment: OrthoMeasure at 100% against Protractor+'s 15%. OrthoMeasure also leads on rating (5.0 vs 4.1) and in-app purchases (none vs 1). Protractor+'s advantage is ratings volume (10K vs 2). On price, ads, device support and iOS requirement 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. Protractor+ sells 1 one-off in-app purchase. OrthoMeasure asks for nothing beyond the download.
OrthoMeasure holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Protractor+ has 10K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 15% of Protractor+'s written reviews are positive against 100% of OrthoMeasure's.
Protractor+ ships an update every 2 months, OrthoMeasure every 5 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Protractor+ | OrthoMeasure |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (10K ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 14.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 10K — better | 2 |
| Update frequency | Every 2 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 17.6 |
| Further details — not scored | ||
| Size | 21 MB | 3 MB |
| Age rating | 4+ | 12+ |
| Developer | Tue Nguyen Minh | Hadi Altabatabaae |
Customer experience
Protractor+
OrthoMeasure
Bugs and requests
Protractor+
Reported bugs
3 issues- Camera feature not working as expected
- Angle measurements not accurate
- Frequent app crashes
Requested features
3 requests- Ability to measure in degrees without upgrade
- Improved accuracy and responsiveness
- Removal of timeouts and paywalls
OrthoMeasure
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Protractor+
- Pro Features$1.99
OrthoMeasure
No in-app purchases
Questions
Is Protractor+ free?
Is OrthoMeasure free?
Which has better reviews, Protractor+ or OrthoMeasure?
Do Protractor+ or OrthoMeasure have ads?
Which is updated more often, Protractor+ or OrthoMeasure?
Other comparisons
