Comparison

Right Angle vs Triangle Solver Free

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

Head to head
About

Right Angle

This app calculates triangles and segments of circles. It supports various angle input formats and offers solutions for oblique triangles and circle segments with optional add-ons. A right triangle calculator is included for free.

Highlights
  • Triangle solver
  • Circle segment calculator
  • Multiple angle units (degrees, radians, DMS, grade, x/12)
  • Oblique triangle solver (add-on)
  • Circle segment solver (add-on)
  • Free right triangle calculator
Features
Read full description

Right Angle is a calculator built for carpenters, builders, surveyors, machinists, and engineers — anyone who needs to solve a triangle, a trapezoid, or a circle without reaching for a notepad and the law of sines. Enter any valid combination of sides and angles and Right Angle solves the rest, including perimeter and area. The right triangle calculator is included for free; every other shape unlocks with a one-time Pro purchase or subscription. SHAPES • Right triangle (free) • Oblique triangle • Isosceles, right, and general trapezoids • Full circle — enter radius, diameter, or circumference • Segment of a circle ANGLE FORMATS • Decimal degrees • Radians • Degrees / minutes / seconds (DMS) • Percent grade • Pitch (x-over-12) LENGTH FORMATS • Decimal — the original, unitless entry. Best for metric. • Feet, inches & fractions — type values like 2' 5 1/2". • Inches & fractions — type values like 40 1/2". Pick a fraction precision from 1/2 down to 1/64 inch. Inputs and outputs both use the format you choose, and you can switch any time from Settings. DESIGNED FOR THE JOB SITE • A custom on-screen keyboard puts the symbols you need — feet, inches, fraction slash, degree, prime, double-prime — one tap away. • Helpful errors when an input combination can't be solved, instead of silent failures. • Available in English and Spanish — iOS picks the language to match your device. • Full VoiceOver support across the keyboard, input fields, shape diagrams, and results. Animations respect the Reduce Motion setting. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: http://rightangleapp.com/privacy.html

About

Triangle Solver Free

This app calculates missing values for both right and irregular triangles. Simply input two known values for a right triangle or three for an irregular one, and it will compute the remaining sides and angles.

Highlights
  • Right triangle solver
  • Irregular triangle solver
  • Calculates missing sides
  • Calculates missing angles
Features
Read full description

## Useful Triangle Calculator ## + Right Triangle Solver: Enter 2 values of triangle, calculate the rest values. + Irregular Triangle Solver: Enter 3 values of triangle, calculate the rest values.

Screenshots

Right Angle4 screens
Triangle Solver Free3 screens

Verdict

The call

The clearest difference is review sentiment: Right Angle at 73% against Triangle Solver Free's 27%. Right Angle also leads on rating (3.9 vs 3.6). Triangle Solver Free's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (6.0 vs 26.0). On price, ratings volume, ads and in-app purchases 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. Right Angle sells 9 in-app purchases, starting at $2.99 per month and Triangle Solver Free sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Right Angle holds the better App Store score, 3.9 against 3.6. Both are backed by a comparable volume of ratings — 30 and 40 respectively. Written reviews point the same way: 73% of Right Angle's written reviews are positive against 27% of Triangle Solver Free's.

Scorecard4 real differences · 6 level
Right Angle versus Triangle Solver Free: the parameters behind the verdict, then further details
ParameterRight AngleTriangle Solver Free
PriceFreeFree
Rating3.9 (30 ratings) — better3.6 (40 ratings)
Positive reviews73.3% of reviews — better26.7% of reviews
Number of ratings3040 — better
Update frequencyEvery 5 days—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.06.0 — better
Further details — not scored
Size2 MB25 MB
Age rating4+4+
DeveloperJerry Mayers境 饶

Customer experience

Right Angle

All ratings30 ratings
Positive70.0%
Neutral3.3%
Negative26.7%
Written reviews86 reviews
Positive73.3%
Neutral4.7%
Negative22.1%

Triangle Solver Free

All ratings40 ratings
Positive70.0%
Neutral0.0%
Negative30.0%
Written reviews15 reviews
Positive26.7%
Neutral6.7%
Negative66.7%

Bugs and requests

Right Angle

Reported bugs

5 issues
  • App crashes after startup
  • Update caused app to crash
  • Loss of previously purchased unlocked app
  • Keyboard covers input fields
  • App changes mm to unspecified units

Requested features

9 requests
  • Restore fraction support
  • Restore feet and inches support
  • Provide both angles of a right triangle
  • Allow scrolling or hiding the keyboard
  • Bundling with other tools
Show 4 more
  • Add metric units (millimeters)
  • Option to choose metric inputs
  • Dark mode option
  • Advanced analytics dashboard

Triangle Solver Free

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Right Angle

Subscriptions2
  • Renews Monthly14 Days trial$2.991 Month
  • Renews Yearly1 Month trial$14.991 Year
One-time7
  • Small Tip$2.99
  • Medium Tip$4.99
  • Segments Calculator$5.99
Show 4 more
  • Oblique Triangle Calculator$5.99
  • Segment & Oblique Triangle$6.99
  • Large Tip$9.99
  • Huge Tip$29.99
1 purchases

Triangle Solver Free

One-time1
  • Pro$0.99

Questions

Is Right Angle free?
Right Angle is free to download, with in-app purchases available.
Is Triangle Solver Free free?
Triangle Solver Free is free to download, with in-app purchases available.
Which has better reviews, Right Angle or Triangle Solver Free?
Right Angle is rated higher. Right Angle averages 3.9 out of 5 from 30 ratings, while Triangle Solver Free averages 3.6 from 40 ratings.
Do Right Angle or Triangle Solver Free have ads?
Neither Right Angle nor Triangle Solver Free shows ads.

Other comparisons