About Right Angle
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...
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
Version History • Now available in Spanish — iOS picks the language to match your device. • Three new trapezoid solvers: isosceles, right, and general. Enter the sides and angles you know and the rest fills in, along with area and perimeter. • A new full-circle solver — type any one of radius, diameter, or circumference and the other two plus the area come back. • On smaller screens, the input you're editing now scrolls up above the keyboard so the instructions and any error stay visible. • The keyboard fades in smoothly when Reduce Motion is enabled. 6.0.0 May 21 What's New • Feet, Inches & Fractions: A new Settings option lets you enter and display lengths as feet/inches with fractions (e.g. 2' 5 1/2") or inches with fractions (e.g. 40 1/2"). Decimal stays the default, so metric users won't be affected. Pick a fraction precision from 1/2 down to 1/64 inch. • More Oblique Triangle solutions: Seven additional input combinations the Oblique Triangle calculator couldn't previously solve are now supported, including new "two sides + one angle" and "one side + two angles" arrangements. • Bug fixes: – Right triangles entered as two sides plus the opposite angle no longer return a negative third side in certain cases. – Entering 0° 0' 0" no longer crashes the app — you'll see a clear error instead. – Oblique triangles with two angles totaling 180° or more now show a helpful error rather than a nonsensical result. – The percent-grade key on the keyboard now shows the correct symbol. 5.8.0 May 17 Fix crash 5.7.3 Apr 6 Bug fixes 5.7.2 Apr 5 * Fixed issue with resubscribing after canceling a subscription * Fixed an issue with a very specific calculation causing a crash 5.7.1 11/24/2025 Improvements to the support center. 5.7.0 11/19/2025 Improved reliability when your internet connection is down. 5.6.1 11/14/2024 Changes to feature unlock purchases. 5.6.0 11/12/2024 Simplified length inputs. You no longer need to pick metric or imperial units. Simply enter the values in the units you want, and the result will be in those units. 5.5.0 11/08/2024 Improved reliability restoring purchases. 5.4.0 11/03/2024 Added the second angle calculation for right triangles. 5.3.0 04/23/2024 Added missing oblique triangle solving for: AB, AC, B. 5.2.0 04/07/2024 Added privacy manifest 5.1.7 03/28/2024 Fixed crash when trying to solve triangles with one angle that is greater then 178 degrees, but less then 180 degrees. 5.1.6 03/28/2024 Fixed fraction key 5.1.5 11/12/2023 Bug fixes 5.1.4 11/07/2023 Bug fixes 5.1.3 11/03/2023 Bug fixes 5.1.2 11/02/2023 Bug fixes 5.1.1 10/25/2023 New app design for iOS 16 users 5.1.0 10/15/2023 Bug fixes 5.0.4 09/28/2023 Fixed a crash with an unlucky series of inputs 5.0.3 09/25/2023 Bug fixes 5.0.2 09/21/2023 Updated the design to take more advantage of large screens. 5.0.1 09/20/2023 Updated the design to take more advantage of large screens. 5.0.0 09/19/2023
Previous Versions
Here you can find the changelog of Right Angle since it was posted on our website on 2016-09-24 15:47:13.
The latest version is 6.0.0 and it was updated on 2026-06-27 21:45:55. See below the changes in each version.
Right Angle version 6.0.0
Updated At: 2026-06-09
Changes: Version History • Now available in Spanish — iOS picks the language to match your device.
• Three new trapezoid solvers: isosceles, right, and general. Enter the sides and angles you know and the rest fills in, along with area and perimeter.
• A new full-circle solver — type any one of radius, diameter, or circumference and the other two plus the area come back.
• On smaller screens, the input you're editing now scrolls up above the keyboard so the instructions and any error stay visible.
• The keyboard fades in smoothly when Reduce Motion is enabled. 6.0.0 May 21 What's New
• Feet, Inches & Fractions: A new Settings option lets you enter
and display lengths as feet/inches with fractions (e.g. 2' 5 1/2")
or inches with fractions (e.g. 40 1/2"). Decimal stays the default,
so metric users won't be affected. Pick a fraction precision from
1/2 down to 1/64 inch.
• More Oblique Triangle solutions: Seven additional input combinations
the Oblique Triangle calculator couldn't previously solve are now
supported, including new "two sides + one angle" and "one side + two
angles" arrangements.
• Bug fixes:
– Right triangles entered as two sides plus the opposite angle no
longer return a negative third side in certain cases.
– Entering 0° 0' 0" no longer crashes the app — you'll see a clear
error instead.
– Oblique triangles with two angles totaling 180° or more now show
a helpful error rather than a nonsensical result.
– The percent-grade key on the keyboard now shows the correct symbol. 5.8.0 May 17 Fix crash 5.7.3 Apr 6 Bug fixes 5.7.2 Apr 5 * Fixed issue with resubscribing after canceling a subscription
* Fixed an issue with a very specific calculation causing a crash 5.7.1 11/24/2025 Improvements to the support center. 5.7.0 11/19/2025 Improved reliability when your internet connection is down. 5.6.1 11/14/2024 Changes to feature unlock purchases. 5.6.0 11/12/2024 Simplified length inputs. You no longer need to pick metric or imperial units. Simply enter the values in the units you want, and the result will be in those units. 5.5.0 11/08/2024 Improved reliability restoring purchases. 5.4.0 11/03/2024 Added the second angle calculation for right triangles. 5.3.0 04/23/2024 Added missing oblique triangle solving for: AB, AC, B. 5.2.0 04/07/2024 Added privacy manifest 5.1.7 03/28/2024 Fixed crash when trying to solve triangles with one angle that is greater then 178 degrees, but less then 180 degrees. 5.1.6 03/28/2024 Fixed fraction key 5.1.5 11/12/2023 Bug fixes 5.1.4 11/07/2023 Bug fixes 5.1.3 11/03/2023 Bug fixes 5.1.2 11/02/2023 Bug fixes 5.1.1 10/25/2023 New app design for iOS 16 users 5.1.0 10/15/2023 Bug fixes 5.0.4 09/28/2023 Fixed a crash with an unlucky series of inputs 5.0.3 09/25/2023 Bug fixes 5.0.2 09/21/2023 Updated the design to take more advantage of large screens. 5.0.1 09/20/2023 Updated the design to take more advantage of large screens. 5.0.0 09/19/2023
Right Angle version 5.7.1
Updated At: 2025-11-24
Changes: * Fixed issue with resubscribing after canceling a subscription
* Fixed an issue with a very specific calculation causing a crash
Right Angle version 5.6.1
Updated At: 2024-11-14
Changes: Nov 14, 2024
Version 5.6.1
Improved reliability when your internet connection is down.
Right Angle version 5.3.0
Updated At: 2024-04-23
Changes: Apr 23, 2024
Version 5.3.0
Added the second angle calculation for right triangles.
Right Angle version 5.2.0
Updated At: 2024-04-07
Changes: Apr 7, 2024
Version 5.2.0
Added missing oblique triangle solving for: AB, AC, B.
Right Angle version 5.1.7
Updated At: 2024-03-28
Changes: Mar 28, 2024
Version 5.1.7
Added privacy manifest
Right Angle version 5.1.5
Updated At: 2023-11-12
Changes: Nov 12, 2023
Version 5.1.5
Fixed fraction key
Right Angle version 5.1.4
Updated At: 2023-11-07
Changes: Nov 7, 2023
Version 5.1.4
Bug fixes
Right Angle version 5.1.1
Updated At: 2023-10-25
Changes: Oct 25, 2023
Version 5.1.1
Bug fixes
Right Angle version 5.1.0
Updated At: 2023-10-15
Changes: Oct 15, 2023
Version 5.1.0
New app design for iOS 16 users
Disclaimer
Official App Store Link
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