Protractor+ vs Protractor Smart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Protractor+
Transform your device into a versatile angle measurement tool. Easily measure angles in both degrees and radians with an intuitive interface. Ideal for quick and precise angle readings.
- Angle measurement
- Degrees and radians
- Intuitive visual control
- Elegant design
- Pocket protractor functionality
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Protractor helps you to measure angles quickly and easily. This app turn your iPhone into a handy pocket protractor that can measure angles in both degrees and radians. Features: - Elegant design - Measure in degrees and radians - Intuitive visual control
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 !!!
Screenshots
Verdict
The clearest difference is rating: Protractor Smart at 4.6 against Protractor+'s 4.1. Protractor Smart also leads on review sentiment (40% vs 15%) and iOS requirement (14.0 vs 17.6). Protractor+'s advantage is update cadence (every 2 months vs every 21 months) and ratings volume (10K vs 242). On price, ads, in-app purchases and monetization model 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+ sells 1 one-off in-app purchase and Protractor Smart sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Protractor Smart holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: Protractor+ has 10K ratings behind it against 242, so its average is the more settled of the two. Written reviews point the same way: 15% of Protractor+'s written reviews are positive against 40% of Protractor Smart's.
Protractor+ ships an update every 2 months, Protractor Smart every 21 months. Both last shipped on September 22, 2026.
| Parameter | Protractor+ | Protractor Smart |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (10K ratings) | 4.6 (242 ratings) — better |
| Positive reviews | 14.9% of reviews | 40.4% of reviews — better |
| Number of ratings | 10K — better | 242 |
| Update frequency | Every 2 months — better | Every 21 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Tue Nguyen Minh | ExaMobile S.A. |
Customer experience
Protractor+
Protractor Smart
Bugs and requests
Protractor+
Reported bugs
3 issues- Camera feature not working as expected
- Angle measurements not accurate
- Frequent app crashes
Requested features
3 requests- Ability to measure in degrees without upgrade
- Improved accuracy and responsiveness
- Removal of timeouts and paywalls
Protractor Smart
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Protractor+
- Pro Features$1.99
Protractor Smart
- AdBlock - Remove ads$1.99
Questions
Is Protractor+ free?
Is Protractor Smart free?
Which has better reviews, Protractor+ or Protractor Smart?
Do Protractor+ or Protractor Smart have ads?
Which is updated more often, Protractor+ or Protractor Smart?
Other comparisons
