Comparison

Angulus Pro 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

Angulus Pro

This app provides professional-grade angle measurements for clinical and personal use. It offers high precision, multiple measurement modes, and AI-powered camera assistance for accurate assessments and progress tracking.

Highlights
  • Precision to 0.01°
  • Four Measurement Modes
  • AI-Powered Camera Overlay
  • Real-Time Analysis
  • Clinical Documentation & Export
  • Progress Tracking
Features
Read full description

Angulus Pro: Clinically Validated Angle Measurement Trusted by researchers worldwide with 40+ peer-reviewed publications. Angulus Pro delivers professional-grade angle measurements validated in leading medical journals: • Journal of Medical Internet Research • Journal of Clinical Orthopaedics and Trauma • Journal of Neuromuscular Diseases → Learn more: https://www.yonaga.app/angulus/research Research Validated • 40 published studies using Angulus (2021-2026) • 3,000+ patients assessed by researchers • Validated against gold-standard goniometry • Applied in orthopedics, rehabilitation, neurology, and sports medicine Key Features • Precision to 0.01°: Professional accuracy for clinical assessments • Four Measurement Modes: V, W, X, and N modes for ROM, fractures, and specialized angles • AI-Powered Camera: Overlay technology for precise alignment • Real-Time Analysis: Instant measurements from camera or photo library • Clinical Documentation: Add annotations and export reports • Progress Tracking: Monitor improvement over time Professional Applications • Joint range of motion (ROM) • Hallux valgus and deformity angles • Fracture assessment • Postural analysis • Telehealth assessments For Patients and Non-Clinical Users • Track rehabilitation progress • Share measurements with providers • Sports performance analysis Privacy Policy: https://www.yonaga.app/angulus/privacy Terms of Use (EULA): Yonaga - https://yonaga.app/angulus/terms Apple - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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

Angulus Pro4 screens
Protractor Angle Meter4 screens

Verdict

The call

The clearest difference is in-app purchases: Protractor Angle Meter at none against Angulus Pro's 3. Protractor Angle Meter also leads on rating (5.0 vs 4.6). Angulus Pro's advantage is ratings volume (26 vs 1). On price, update cadence, ads and monetization model 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. Angulus Pro sells 3 in-app purchases, starting at $2.99 per month. Protractor Angle Meter asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Protractor Angle Meter holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Angulus Pro has 26 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. Both last shipped on September 22, 2026.

Scorecard3 real differences · 7 level
Angulus Pro versus Protractor Angle Meter: the parameters behind the verdict, then further details
ParameterAngulus ProProtractor Angle Meter
PriceFreeFree
Rating4.6 (26 ratings)5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings26 — better1
Update frequencyFortnightlyFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS17.617.6
Further details — not scored
Size134 MB56 MB
Age rating4+4+
DeveloperYonagaRomiick LLC

Customer experience

Angulus Pro

All ratings26 ratings
Positive88.5%
Neutral3.8%
Negative7.7%

Protractor Angle Meter

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Angulus Pro

Subscriptions2
  • Angulus Pro Monthly7 Days trial$2.991 Month
  • Angulus Pro Annually$29.991 Year
One-time1
  • Angulus Pro Lifetime$49.99
None

Protractor Angle Meter

No in-app purchases

Questions

Is Angulus Pro free?
Angulus Pro 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.
Which has better reviews, Angulus Pro or Protractor Angle Meter?
Protractor Angle Meter is rated higher. Angulus Pro averages 4.6 out of 5 from 26 ratings, while Protractor Angle Meter averages 5.0 from 1 ratings.
Do Angulus Pro or Protractor Angle Meter have ads?
Neither Angulus Pro nor Protractor Angle Meter shows ads.
Which is updated more often, Angulus Pro or Protractor Angle Meter?
Angulus Pro ships an update fortnightly, and Protractor Angle Meter fortnightly. Most recently, Angulus Pro was updated on September 22, 2026 and Protractor Angle Meter on September 22, 2026.

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