Comparison

Protractor vs Protractor Angle Meter

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Protractor

Features
Read full description

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

About

Protractor Angle Meter

This app allows you to measure angles from photos using your device's camera or existing images. Add multiple measurements with customizable colors and labels, and view results in various units. Save your work automatically and export high-quality images of your measurements.

Highlights
  • Measure angles from photos
  • Live camera or photo library input
  • Multiple angle measurements per photo
  • Customizable color and labels
  • Degrees, radians, or slope percentage output
  • Precision Loupe for accuracy
  • Automatic saving
Features
Read full description

Protractor Angle Meter turns any photo into a precise workspace for measuring one angle or many. Frame an object in the live camera and freeze the image, or choose a photo from your library. Add as many angle measurements as you need to one photo. Change each measurement’s color and add an optional label so even complex checks remain easy to read. Use a shared pivot with two rays, or switch to four-point mode for two independent lines—even when their intersection lies outside the image. Drag any point while the Precision Loupe shows an enlarged crosshair above your finger. Pinch to zoom, pan the image, snap in 15° steps, and feel haptic feedback as you adjust. Measure interior, exterior, and reflex angles. View results in degrees, radians, or slope percentage. Every change saves automatically, so you can return to a measurement whenever you need it. With Premium Pass, export and share a clear JPEG containing the photo, colored measurement lines, arcs, values, and labels. Your saved source photo remains unchanged. No ads. Save up to 10 photo-based measurement records for free, with unlimited angle measurements inside every record. A one-time Premium Pass unlocks result-image sharing and unlimited records. No subscription.

Screenshots

Protractor4 screens
Protractor Angle Meter4 screens

Verdict

The call

The clearest difference is in-app purchases: Protractor Angle Meter at none against Protractor's 3. Protractor Angle Meter also leads on update cadence (fortnightly vs every 6 weeks). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Protractor sells 3 in-app purchases, starting at $4.99 per 7 days. Protractor Angle Meter asks for nothing beyond the download.

UpkeepUpdate frequency

Protractor ships an update every 6 weeks, Protractor Angle Meter fortnightly. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

Scorecard2 real differences · 8 level
Protractor versus Protractor Angle Meter: the parameters behind the verdict, then further details
ParameterProtractorProtractor Angle Meter
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 6 weeksFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free with in-app purchases
DevicesiPhoneiPhone
Requires iOS17.0 — better17.6
Further details — not scored
Size5 MB56 MB
Age rating4+4+
DeveloperPhuc PhamRomiick LLC

In-app purchases

3 purchases

Protractor

Subscriptions2
  • Incline Gauge Weekly$4.997 Days
  • Roof Pitch Yearly$24.991 Year
One-time1
  • Bevel & Degree, Pay Once$49.99
None

Protractor Angle Meter

No in-app purchases

Questions

Is Protractor free?
Protractor is free to download, with in-app purchases available.
Is Protractor Angle Meter free?
Protractor Angle Meter is free to download, with no in-app purchases.
Do Protractor or Protractor Angle Meter have ads?
Neither Protractor nor Protractor Angle Meter shows ads.
Which is updated more often, Protractor or Protractor Angle Meter?
Protractor ships an update every 6 weeks, and Protractor Angle Meter fortnightly. Most recently, Protractor was updated on September 24, 2026 and Protractor Angle Meter on September 22, 2026.

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