Comparison

iGradient vs Protractor

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

Head to head
About

iGradient

This app uses your device's sensors to accurately measure any 2D angle. It intelligently detects orientation and provides readings in degrees, radians, or as a gradient. Ideal for various practical applications requiring precise angle measurements.

Highlights
  • Measures 2D angles
  • Intelligent orientation detection
  • Reads in degrees, radians, or gradient
  • Accurate to 1 degree
  • Switches between horizontal/vertical axis
  • Holds measurement
  • No calibration needed
Features
Read full description

With iGradient you can use your iPhone, iPad or iPod Touch to find any 2D angle. No need to tell the iPhone what angle you want, iGradient knows which way you’re holding your device and finds it. It’s a no mess, no fuss tool; great for engineering, landscaping, DIY, you name it! Features: - Simple to use - Intelligently detects if you want to find an angle in portrait or landscape - Measures angle in degrees, radians or as a gradient - Accurate to 1 degree - Switches between measuring the angle from the horizontal or vertical axis - Holds the measurement for easy reading - No calibration required - Can email your reading

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

Screenshots

iGradient4 screens
Protractor4 screens

Verdict

The call

The clearest difference is price: Protractor at Free against iGradient's $2.99. Protractor also leads on update cadence (every 6 weeks vs every 6 months). iGradient's advantage is in-app purchases (none vs 3) and device support (3 vs 1). On ads 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

Protractor is free to download; iGradient costs $2.99 up front. Protractor sells 3 in-app purchases, starting at $4.99 per 7 days. iGradient asks for nothing beyond the download.

UpkeepUpdate frequency

iGradient ships an update every 6 months, Protractor every 6 weeks. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

Scorecard5 real differences · 5 level
iGradient versus Protractor: the parameters behind the verdict, then further details
ParameteriGradientProtractor
Price$2.99Free — better
Rating4.3 (7 ratings) — better—
Positive reviews93.5% of reviews—
Number of ratings7 — better—
Update frequencyEvery 6 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS9.3 — better17.0
Further details — not scored
Size10 MB5 MB
Age rating4+4+
DeveloperIvan PerrePhuc Pham

In-app purchases

None

iGradient

No 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

Questions

Is iGradient free?
iGradient costs $2.99, with no in-app purchases.
Is Protractor free?
Protractor is free to download, with in-app purchases available.
Do iGradient or Protractor have ads?
Neither iGradient nor Protractor shows ads.
Which is updated more often, iGradient or Protractor?
iGradient ships an update every 6 months, and Protractor every 6 weeks. Most recently, iGradient was updated on October 10, 2026 and Protractor on October 3, 2026.

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