# Protractor Smart vs Protractor Edge

The clearest difference is ads: Protractor Smart at none against Protractor Edge's shown. Protractor Smart also leads on update cadence (every 21 months vs every 43 months) and ratings volume (242 vs 55). Protractor Edge's advantage is review sentiment (70% vs 44%) and iOS requirement (9.0 vs 14.0). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Protractor Smart sells 1 one-off in-app purchase and Protractor Edge sells 2 in-app purchases, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for Protractor Smart against 4.5 for Protractor Edge. Both are backed by a comparable volume of ratings — 242 and 55 respectively. Written reviews are what separate them: 44% of Protractor Smart's written reviews are positive against 70% of Protractor Edge's.

Protractor Smart ships an update every 21 months, Protractor Edge every 43 months. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Protractor Smart | Protractor Edge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (242 ratings)](https://appshunter.io/ios/app/protractor-smart/id1076530001/reviews)** | [4.5 (55 ratings)](https://appshunter.io/ios/app/protractor-edge-clinometer/id1198499762/reviews) |
| Number of ratings | **242** | 55 |
| Positive reviews | 43.6% of reviews | **69.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 21 months** | Every 43 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 11 MB | 21 MB |
| Requires iOS | 14.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [嵩 张](https://appshunter.io/developer/1091921941) |

## 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


### Protractor Edge

[App page](https://appshunter.io/ios/app/protractor-edge-clinometer/id1198499762)

Measure angles directly on your device without taking photos or placing the angle on screen. This app offers a unique and efficient way to determine degrees, saving you time with its handy assistant functionality.

**Highlights:** Direct angle measurement on device, Intuitive line dragging interface, Measures angles in photos (Premium), Measures from camera view (Premium), Ad-free experience (Premium)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $1.99 | per year |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Protractor Smart free?

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

### Is Protractor Edge free?

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

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

Protractor Smart is rated higher. Protractor Smart averages 4.6 out of 5 from 242 ratings, while Protractor Edge averages 4.5 from 55 ratings.

### Do Protractor Smart or Protractor Edge have ads?

Protractor Edge shows ads; Protractor Smart does not.

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

Protractor Smart ships an update every 21 months, and Protractor Edge every 43 months. Most recently, Protractor Smart was updated on October 13, 2026 and Protractor Edge on October 11, 2026.

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