Protractor vs Angle Finder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Protractor
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PAID ACCESS REQUIRED Protractor is a paid app. A weekly or yearly auto-renewable subscription, or a one-time lifetime purchase, is required to use every feature after onboarding. There is no free version and no free trial. Measure any angle without a physical protractor. Drag two arms across the screen, aim the camera at a real object, or rest your phone on a slope and read the tilt live. Most angle apps give you one trick. Protractor gives you three measuring surfaces in one app — an on-screen protractor for photos and drawings, a see-through camera overlay for real objects, and a motion-sensor inclinometer for surfaces you can put your phone on. Every reading comes out in degrees, radians or percent grade, and roof work gets the rise-in-12 pitch on the same screen. WHAT YOU GET - Read the exact degree of any corner on a photo or drawing by dragging two arms and the vertex onto it - Point the camera at a wall, ramp, roof edge or shelf and measure the angle right on the live view - Turn your phone into a digital level that shows pitch, roll, percent grade and roof pitch as rise:12 at once - Lock a reading with Hold or Freeze so the number stays put while you climb down or move the phone - Keep every measurement in History with a photo thumbnail, plus your saved count, average and widest angle - Switch between degrees, radians and grade in one tap, with a built-in conversion table for common values PERFECT FOR - DIY and home projects: shelves, picture rails, ramps, furniture - Roofing, decking and construction: slope, grade and pitch checks - Woodworking and metalwork: bevels, miters and corner angles - Students and teachers measuring angles on diagrams and photos WHY NOT JUST USE A PLASTIC PROTRACTOR A plastic protractor only works on paper, only reads what fits inside its arc, and is never in your pocket when the roof needs checking. This one measures on a photo, through the camera, or straight off a surface — and it remembers every reading instead of you writing them on a scrap of wood. PRIVACY Everything is measured and stored on your device. No account, no sign-up, no cloud upload of your photos or readings. The camera feed is used only to draw the protractor on top of it, and the app works with no internet connection. FULL ACCESS Full access unlocks the camera protractor, the live inclinometer, saved measurement history and all angle units. It is offered as a weekly subscription, a yearly subscription, or a one-time lifetime purchase. Your exact plan and price are shown before you confirm, and subscriptions renew until cancelled in your App Store settings. Open Protractor, point it at the next angle you need, and get the number in seconds. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? Email tphuc.work@gmail.com
Angle Finder
Measure angles directly on your device using your camera or photos. This tool offers a digital protractor and the ability to place points on images to calculate angles. Results can be saved or shared as PNG screenshots.
- Measure angles with three draggable points
- Digital screen protractor
- Measure angles over photos
- Camera preview for real-world measurements
- Save and share PNG screenshots
- Local-first workflow
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Angle Finder helps you measure angles with a clean, local-first mobile workflow. Use it as a digital protractor, place three draggable points over a photo, or capture a camera snapshot with an angle overlay. Export the result as a PNG, save it to your photo library, or share it with another app when you choose. Key features: • Measure angles with three draggable points • Use a simple screen protractor for diagrams and sketches • Pick a local photo and measure over the image • Use the camera preview for real-world angle checks • Save or share a PNG measurement screenshot • No account and no required upload workflow • One clearly separated banner ad below the measurement controls Angle Finder is useful for quick geometry checks, DIY planning, classroom examples, diagrams, crafts, and everyday visual angle measurement. Accuracy depends on how you position the points and the quality of the photo or camera view. For safety-critical, construction-code, medical, or legal measurements, verify with calibrated professional tools. This app uses Apple’s standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Angle Finder at none against Protractor's 3. Angle Finder also leads on update cadence (fortnightly vs every 6 weeks). Protractor's advantage is ads (none vs shown). On price, device support and iOS requirement 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 3 in-app purchases, starting at $4.99 per 7 days. Angle Finder asks for nothing beyond the download.
Protractor ships an update every 6 weeks, Angle Finder fortnightly. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.
| Parameter | Protractor | Angle Finder |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 weeks | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | — | Ad-supported |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 | 16.4 — better |
| Further details — not scored | ||
| Size | 5 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Phuc Pham | 侃 黄 |
In-app purchases
Protractor
- Incline Gauge Weekly$4.997 Days
- Roof Pitch Yearly$24.991 Year
- Bevel & Degree, Pay Once$49.99
Angle Finder
No in-app purchases





