Protractor Smart vs Digital Angle Finder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Protractor Smart
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.
- Camera-based angle measurement
- Touch measure mode
- Plumb bob measure for slopes
- Polygon measurement (premium)
- Screenshot functionality
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Protractor - smart instrument to measure angles. Turn on the camera mode and measure the angle of buildings, mountains, or any other object around you. This app includes two free measuring modes: - Touch measure - touch the screen to set the angle (use camera view!). - Plumb bob measure - pendulum - use to determine the slope (remember to calibrate the plumb). In each mode, you can switch to camera view and take measurements of all objects around you. Additional Premium mode: Polygon measurement lets you draw any shape on your screen to check all its angles. Turn on the camera to see the real object through your phone and copy its shape. You can also pick a photo from your gallery or take a new picture to draw a shape on the image. In Premium mode, you can change colors, add helper lines, and switch between different angle units. All modes allows you to make a screenshot of anything on the screen. Enjoy !!!
Digital Angle Finder
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.
- Precise angle measurement
- 3D angle measurement
- Protractor mode
- Save measurements with photos
- High accuracy (1-degree error)
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Digital Angle Finder is an app for precise measurement of angles, simply by moving your device. The "Digital Angle Finder" app measures the angle of the device, using the accelerometer and gyroscope. Just place your device against two surfaces in turn and "Digital Angle Finder" will give you the angle between them. In the protractor mode you can also determine the angle between lines on a plane: in order to do so align the edge of your device alternately against the sides of the angle. The accuracy of angles measurement is rather high: the error is only one degree! You'll appreciate the ability to save the measurement by taking a photo with the measured angle recorded on it. We are sure that you will like the design of this app. Digital Angle Finder is an app that adds a new feature to your device which you have never imagined!
Screenshots
Verdict
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.
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 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.
| Parameter | Protractor Smart | Digital Angle Finder |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (242 ratings) — better | 4.1 (233 ratings) |
| Positive reviews | 40.4% of reviews | 54.3% of reviews — better |
| Number of ratings | 242 — better | 233 |
| Update frequency | Every 21 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 11 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | ExaMobile S.A. | ALEXEY BRILEV |
Customer experience
Protractor Smart
Digital Angle Finder
Bugs and requests
Protractor Smart
Not enough reviews yet to summarise bugs or requests.
Digital Angle Finder
Reported bugs
8 issues- 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
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- App is outdated and doesn't work on older iPhones (iPhone 6s Plus)
- App is slow to process measurements
- App is unintuitive to use
Requested features
7 requests- 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
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- Add vibration signal for ready and measured states
- Add ability to measure angle directly in photos
In-app purchases
Protractor Smart
- AdBlock - Remove ads$1.99
Digital Angle Finder
No in-app purchases
Questions
Is Protractor Smart free?
Is Digital Angle Finder free?
Which has better reviews, Protractor Smart or Digital Angle Finder?
Do Protractor Smart or Digital Angle Finder have ads?
Which is updated more often, Protractor Smart or Digital Angle Finder?
Other comparisons
