# Protractor Smart vs OrthoMeasure

The clearest difference is review sentiment: OrthoMeasure at 100% against Protractor Smart's 44%. OrthoMeasure also leads on in-app purchases (none vs 1) and update cadence (every 5 days vs every 21 months). Protractor Smart's advantage is ratings volume (246 vs 2) and device support (3 vs 1). On price and ads there is nothing between them.

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

OrthoMeasure holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Protractor Smart has 246 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 44% of Protractor Smart's written reviews are positive against 100% of OrthoMeasure's.

Protractor Smart ships an update every 21 months, OrthoMeasure every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Protractor Smart | OrthoMeasure |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (246 ratings)](https://appshunter.io/ios/app/protractor-smart/id1076530001/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/orthomeasure/id6755159995/reviews)** |
| Number of ratings | **246** | 2 |
| Positive reviews | 43.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 5 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 11 MB | 3 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [Hadi Altabatabaae](https://appshunter.io/developer/1852313650) |

## What reviewers say

### Protractor Smart

[App page](https://appshunter.io/ios/app/protractor-smart/id1076530001)

This app acts as a smart instrument for measuring angles using your device's camera. It offers two free modes for measuring angles on screen or using a plumb bob for slopes, with an additional premium mode for polygon measurements.

**Highlights:** Camera-based angle measurement, Touch measure mode, Plumb bob measure for slopes, Polygon measurement (premium), Screenshot functionality

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AdBlock - Remove ads | $1.99 | one-time |

**What reviewers like**

- 👍 Useful for measurements
- 👍 Accurate for its purpose
- 👍 Convenient and handy
- 👍 Good for specific tasks (e.g., knife sharpening, stereo mic angles)
- 👍 No excessive charges

**What reviewers complain about**

- 🐛 App freezes/loads indefinitely
- 🐛 Does not launch after updates
- 🐛 Stuck on loading screen
- 🐛 Inaccurate or unstable measurements
- 🐛 Camera quality issues

**Reported bugs**

- App loads indefinitely
- App does not launch after iOS updates
- Stuck on loading screen
- Photo upload not possible in premium version
- Upside-down protractor on iOS

**Requested features**

- Improve camera function (light, zoom)
- Add automatic hold function
- Increase digital readout size
- Add more skins/cosmetics
- Option to remove ads


### OrthoMeasure

[App page](https://appshunter.io/ios/app/orthomeasure/id6755159995)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Protractor Smart free?

Protractor Smart is free to download, with in-app purchases available.

### Is OrthoMeasure free?

OrthoMeasure is free to download, with no in-app purchases.

### Which has better reviews, Protractor Smart or OrthoMeasure?

OrthoMeasure is rated higher. Protractor Smart averages 4.6 out of 5 from 246 ratings, while OrthoMeasure averages 5.0 from 2 ratings.

### Do Protractor Smart or OrthoMeasure have ads?

Neither Protractor Smart nor OrthoMeasure shows ads.

### Which is updated more often, Protractor Smart or OrthoMeasure?

Protractor Smart ships an update every 21 months, and OrthoMeasure every 5 days. Most recently, Protractor Smart was updated on October 24, 2026 and OrthoMeasure on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*