Comparison

Protractor Edge vs TriangleData

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

Head to head
About

Protractor Edge

Measure angles directly on your device without taking photos or placing the angle on screen. This app offers a unique and efficient way to determine degrees, saving you time with its handy assistant functionality.

Highlights
  • Direct angle measurement on device
  • Intuitive line dragging interface
  • Measures angles in photos (Premium)
  • Measures from camera view (Premium)
  • Ad-free experience (Premium)
Features
Read full description

A simple protractor. Just put your device on the angle you want to measure. Then drag the two lines to align the both sides of the angle. The degrees will be there. It is different from other protractor apps. This is a new way to measure angles. It requires neither taking photo nor putting the angle above the screen. Now start using this handy assistant to measure angles which will save you a lot of time. ------------------------------------- PREMIUM ACCESS SUBSCRIPTION - Measure the world from camera - Measure angles in photos - No Ads - The subscription is $0.99 yearly with trial - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that service, where applicable - Terms of use: https://service.notationpad.com/terms_service.html

About

TriangleData

This utility app helps you calculate triangle angles and data. It can determine if a corner is 90 degrees by taking measurements and inputting them into the app. You can also use it to calculate right triangle data.

Highlights
  • Calculate triangle angles
  • Check for 90-degree corners
  • Input measurements for calculation
  • Calculate right triangle data
Features
Read full description

Do you need to check it if a corner has 90 degree? Just take a measuring from the corner to some point on the first side, then do the same on another side and then, take a measuring between these points and pull all 3 measuring in to this app, the app will calculate all angles for you. Or you can just calculate right triangle data. Feel free to use it as you want.

Screenshots

Protractor Edge2 screens
TriangleData3 screens

Verdict

The call

The clearest difference is review sentiment: Protractor Edge at 70% against TriangleData's 0%. Protractor Edge also leads on iOS requirement (9.0 vs 12.0). TriangleData's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Protractor Edge sells 2 in-app purchases, starting at $1.99 per year. TriangleData asks for nothing beyond the download.

UpkeepUpdate frequency

Protractor Edge ships an update every 43 months, TriangleData every 8 days. The most recent releases landed on September 28, 2026 and June 3, 2026 respectively.

Scorecard6 real differences · 4 level
Protractor Edge versus TriangleData: the parameters behind the verdict, then further details
ParameterProtractor EdgeTriangleData
PriceFreeFree
Rating4.5 (55 ratings) — better—
Positive reviews69.6% of reviews — better0.0% of reviews
Number of ratings55 — better—
Update frequencyEvery 43 monthsEvery 8 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better12.0
Further details — not scored
Size21 MB25 MB
Age rating4+4+
Developer嵩 张Kiryl Sabko

Customer experience

Protractor Edge

All ratings55 ratings
Positive85.5%
Neutral5.5%
Negative9.1%
Written reviews46 reviews
Positive69.6%
Neutral8.7%
Negative21.7%

TriangleData

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

2 purchases

Protractor Edge

Subscriptions1
  • Premium Access7 Days trial$1.991 Year
One-time1
  • Remove Ads$0.99
None

TriangleData

No in-app purchases

Questions

Is Protractor Edge free?
Protractor Edge is free to download, with in-app purchases available.
Is TriangleData free?
TriangleData is free to download, with no in-app purchases.
Do Protractor Edge or TriangleData have ads?
Protractor Edge shows ads; TriangleData does not.
Which is updated more often, Protractor Edge or TriangleData?
Protractor Edge ships an update every 43 months, and TriangleData every 8 days. Most recently, Protractor Edge was updated on September 28, 2026 and TriangleData on June 3, 2026.

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