Comparison

Right Angle vs ShapeInfo Plus

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

ShapeInfo Plus

This app calculates lengths, angles, and areas for various geometric shapes. It supports a wide range of 2D and 3D shapes, making it a handy tool for engineers and students.

Highlights
  • Calculate lengths, angles, and area
  • Calculate volume for 3D shapes
  • Supports various 2D and 3D shapes
  • User-friendly input for calculations
  • Immediate calculation results
Features
Read full description

Feature The ShapeInfo is useful application for calculating shape lengths, angles and area. You can get some calculated lengths and angles of the shape from choosing and entering values in the boxes upon the orange points. How to use 1. Choosing shape from the list. 2. Enter the value to the box upon the orange points. You can change the formation of the orange points by "NEXT" button (orange color) or tapping orange/gray point near the box that you are going to enter the value. 3. You can get calculated values of the shape, immediately after entering values. Applications - For the software developer, the mechanical engineer, the dynamics engineer and the surveying engineer. - Study mathematics for high school students. Functions - Calculate lengths, angles and the area for the right triangle, the triangle, the sector, the circle and ellipse. - Calculate volume for the triangular pyramid, the triangular prism, the circular cone, circular cylinder and the sphere. Shapes - Right triangle - Triangle - Sector - Circle - Ellipse - Triangular pyramid - Triangular prism - Circular cone - Circular cylinder - Oblique cutting circular cylinder - Sphere Disclaimer Appsys does not accept responsibility for any loss, which may arise from reliance on the software or materials published on this site.

Screenshots

Right Angle4 screens
ShapeInfo Plus4 screens

Verdict

The call

The clearest difference is price: Right Angle at Free against ShapeInfo Plus's $0.99. Right Angle also leads on update cadence (every 5 days vs every 6 months). ShapeInfo Plus's advantage is rating (4.6 vs 3.9) and in-app purchases (none vs 9). On review sentiment, ratings volume, ads 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

Right Angle is free to download; ShapeInfo Plus costs $0.99 up front. Right Angle sells 9 in-app purchases, starting at $2.99 per month. ShapeInfo Plus asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ShapeInfo Plus holds the better App Store score, 4.6 against 3.9. Both are backed by a comparable volume of ratings — 30 and 31 respectively. Written reviews complicate that: 73% of Right Angle's written reviews are positive against 68% of ShapeInfo Plus's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Right Angle ships an update every 5 days, ShapeInfo Plus every 6 months. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

Scorecard6 real differences · 4 level
Right Angle versus ShapeInfo Plus: the parameters behind the verdict, then further details
ParameterRight AngleShapeInfo Plus
PriceFree — better$0.99
Rating3.9 (30 ratings)4.6 (31 ratings) — better
Positive reviews73.3% of reviews — better67.9% of reviews
Number of ratings3031 — better
Update frequencyEvery 5 days — betterEvery 6 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.013.0 — better
Further details — not scored
Size2 MB11 MB
Age rating4+4+
DeveloperJerry MayersNoriyasu Kutsuzawa

Customer experience

Right Angle

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

ShapeInfo Plus

All ratings31 ratings
Positive90.3%
Neutral3.2%
Negative6.5%
Written reviews28 reviews
Positive67.9%
Neutral14.3%
Negative17.9%

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

ShapeInfo Plus

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
None

ShapeInfo Plus

No in-app purchases

Questions

Is Right Angle free?
Right Angle is free to download, with in-app purchases available.
Is ShapeInfo Plus free?
ShapeInfo Plus costs $0.99, with no in-app purchases.
Which has better reviews, Right Angle or ShapeInfo Plus?
ShapeInfo Plus is rated higher. Right Angle averages 3.9 out of 5 from 30 ratings, while ShapeInfo Plus averages 4.6 from 31 ratings.
Do Right Angle or ShapeInfo Plus have ads?
Neither Right Angle nor ShapeInfo Plus shows ads.
Which is updated more often, Right Angle or ShapeInfo Plus?
Right Angle ships an update every 5 days, and ShapeInfo Plus every 6 months. Most recently, Right Angle was updated on October 2, 2026 and ShapeInfo Plus on October 6, 2026.

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