Protractor (Angle measurement) vs Goniometer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Protractor (Angle measurement)
Measure angles of objects using your device's camera. This utility app acts as a digital protractor, allowing you to accurately determine angles in real-world scenarios. Perfect for when a physical protractor is unavailable.
- Camera-based angle measurement
- Digital protractor functionality
- Measure angles of objects
- Real-world angle determination
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You are there when you need a protractor? Here is the absence of a protractor, try using a protractor app. You can measure the angle of the object is reflected in the camera protractor. Try using a protractor protractor various apps, app.
Goniometer
Easily record joint motion range using Bluetooth connection with a digital goniometer. Track personal rehabilitation training progress for joint movement. Remember to consult a doctor before making medical decisions.
- Bluetooth connectivity with digital goniometer
- Record joint range of motion
- Track personal rehabilitation status
- Monitor joint movement progress
- Easy data recording
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The app use bluetooth connect with GR digital goniometer to record the angle range of joint motion easily. It can track record personal rehabilitation training status of joint motion. APP可通过蓝牙与GR数显角度尺连接并记录关节活动度的测量数据，帮助追踪个人康复训练情况。多一份准备，少一分担心，精准记录关节活动康复进度。 Disclaimer reminding：users to seek a doctor’s advice in addition to using this app and before making any medical decisions. 免责声明提醒：用户除了使用此应用程序外，在做出任何医疗决定之前，还应寻求医生的建议。
Screenshots
Verdict
The clearest difference is review sentiment: Protractor (Angle measurement) at 68% against Goniometer's 0%. Protractor (Angle measurement) also leads on rating (3.6 vs 1.0) and ratings volume (10 vs 2). Goniometer's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Protractor (Angle measurement) holds the better App Store score, 3.6 against 1.0. That said, the two scores are not equally well evidenced: Protractor (Angle measurement) has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 68% of Protractor (Angle measurement)'s written reviews are positive against 0% of Goniometer's.
Protractor (Angle measurement) ships an update every 5 weeks, Goniometer monthly. The most recent releases landed on October 13, 2026 and September 27, 2026 respectively.
| Parameter | Protractor (Angle measurement) | Goniometer |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (10 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 68.1% of reviews — better | 0.0% of reviews |
| Number of ratings | 10 — better | 2 |
| Update frequency | Every 5 weeks | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | EONSOFT | GemRed |
Customer experience
Protractor (Angle measurement)
Goniometer
Bugs and requests
Protractor (Angle measurement)
Reported bugs
8 issues- Camera is always blurry
- Ads cover buttons
- App is a ghost app, cannot open
- Time limit makes it unusable
- Measures only in radians (free)
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- Protractor over camera view, no needle/indication
- App is difficult to use
- Hard to hold still without tripod
Requested features
10 requests- Ability to freeze image
- Ability to use photos for measurement
- Upload a still image and overlay protractor
- Improve accuracy with shaky hands
- Add option to take a picture and measure
Show 5 moreShow fewer
- Stabilize the camera
- Make numbers easier to read
- Remove time limit on free version
- Allow measurement in degrees for free
- Delete purchase history
Goniometer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Protractor (Angle measurement)
No in-app purchases
Goniometer
No in-app purchases
Questions
Is Protractor (Angle measurement) free?
Is Goniometer free?
Which has better reviews, Protractor (Angle measurement) or Goniometer?
Do Protractor (Angle measurement) or Goniometer have ads?
Which is updated more often, Protractor (Angle measurement) or Goniometer?
Other comparisons
