# Protractor Smart vs Digital Protractor & Level

The clearest difference is update cadence: Digital Protractor & Level at every 9 days against Protractor Smart's every 21 months. Protractor Smart's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Protractor Smart sells 1 one-off in-app purchase and Digital Protractor & Level sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Protractor Smart ships an update every 21 months, Digital Protractor & Level every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Protractor Smart | Digital Protractor & Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (246 ratings)](https://appshunter.io/ios/app/protractor-smart/id1076530001/reviews)** | — |
| Number of ratings | **246** | — |
| Positive reviews | 43.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 3 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [Robert Carpenter](https://appshunter.io/developer/6792301217) |

## 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


### Digital Protractor & Level

[App page](https://appshunter.io/ios/app/digital-protractor-and-level/id6795648874)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $1.99 | one-time |


## Frequently asked questions

### Is Protractor Smart free?

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

### Is Digital Protractor & Level free?

Digital Protractor & Level is free to download, with in-app purchases available.

### Do Protractor Smart or Digital Protractor & Level have ads?

Neither Protractor Smart nor Digital Protractor & Level shows ads.

### Which is updated more often, Protractor Smart or Digital Protractor & Level?

Protractor Smart ships an update every 21 months, and Digital Protractor & Level every 9 days. Most recently, Protractor Smart was updated on October 24, 2026 and Digital Protractor & Level on October 24, 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.*