# Protractor Smart vs Digital Angle Finder

The clearest difference is rating: Protractor Smart at 4.6 against Digital Angle Finder's 4.1. Digital Angle Finder's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 21 months). On price, ratings volume, ads and device support there is nothing between them.

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

Protractor Smart holds the better App Store score, 4.6 against 4.1. Both are backed by a comparable volume of ratings — 242 and 233 respectively. Written reviews complicate that: 40% of Protractor Smart's written reviews are positive against 54% of Digital Angle Finder's, so the app with the better star average is not the one people write more warmly about.

Protractor Smart ships an update every 21 months, Digital Angle Finder every 2 months. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Protractor Smart | Digital Angle Finder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (242 ratings)](https://appshunter.io/ios/app/protractor-smart/id1076530001/reviews)** | [4.1 (233 ratings)](https://appshunter.io/ios/app/digital-angle-finder-3d-meter/id1081939665/reviews) |
| Number of ratings | **242** | 233 |
| Positive reviews | 40.4% of reviews | **54.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 11 MB | 80 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [ALEXEY BRILEV](https://appshunter.io/developer/667579847) |

## 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 |


### Digital Angle Finder

[App page](https://appshunter.io/ios/app/digital-angle-finder-3d-meter/id1081939665)

Measure angles precisely using your device's sensors.  It functions as both a protractor and a 3D angle meter, allowing you to determine angles between surfaces or lines on a plane with high accuracy. Save your measurements by taking photos with the angle recorded.

**Highlights:** Precise angle measurement, 3D angle measurement, Protractor mode, Save measurements with photos, High accuracy (1-degree error)

**In-app purchases:** none

**What reviewers like**

- 👍 Amazing app, does what it claims
- 👍 No annoying ads or up-sells
- 👍 No tracking
- 👍 Very useful app, love it
- 👍 Easy to used

**What reviewers complain about**

- 🐛 Rien ne se passe
- 🐛 Nicht das was ich gesucht habe
- 🐛 Dauert lange bis Ergebnis angezeigt
- 🐛 Horrible app doesn’t work
- 🐛 Gives wrong measurements (172 degrees)

**Reported bugs**

- No measurements detected
- App doesn't work
- Incorrect measurements (e.g., 172 degrees, 2 and 178 degrees, 179 degrees)
- App doesn't work on vertical angles
- New update ruined the app, only works on still surfaces

**Requested features**

- Add a spirit level function
- Add a function to start and end measurement by pressing a button
- Ability to manually measure angle on a photo
- Display mode for surface vs. edge measurement
- Clarify zero point and measurement range for length measurement


## Frequently asked questions

### Is Protractor Smart free?

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

### Is Digital Angle Finder free?

Digital Angle Finder is free to download, with no in-app purchases.

### Which has better reviews, Protractor Smart or Digital Angle Finder?

Protractor Smart is rated higher. Protractor Smart averages 4.6 out of 5 from 242 ratings, while Digital Angle Finder averages 4.1 from 233 ratings.

### Do Protractor Smart or Digital Angle Finder have ads?

Neither Protractor Smart nor Digital Angle Finder shows ads.

### Which is updated more often, Protractor Smart or Digital Angle Finder?

Protractor Smart ships an update every 21 months, and Digital Angle Finder every 2 months. Most recently, Protractor Smart was updated on September 22, 2026 and Digital Angle Finder on September 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.*