Protractor (Angle measurement) vs SignaKey
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.
SignaKey
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The SignaKey app allows for scanning of custom encoded symbology
Screenshots
Verdict
The clearest difference is ads: SignaKey at none against Protractor (Angle measurement)'s shown. Protractor (Angle measurement)'s advantage is iOS requirement (13.0 vs 15.6). 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) ships an update every 5 weeks, SignaKey monthly. The most recent releases landed on October 22, 2026 and October 2, 2026 respectively.
| Parameter | Protractor (Angle measurement) | SignaKey |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (10 ratings) — better | — |
| Positive reviews | 68.1% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 5 weeks | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 7 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | EONSOFT | SignaKey LLC |
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
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- Stabilize the camera
- Make numbers easier to read
- Remove time limit on free version
- Allow measurement in degrees for free
- Delete purchase history
SignaKey
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Protractor (Angle measurement)
No in-app purchases
SignaKey
No in-app purchases
Questions
Is Protractor (Angle measurement) free?
Is SignaKey free?
Do Protractor (Angle measurement) or SignaKey have ads?
Which is updated more often, Protractor (Angle measurement) or SignaKey?
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