Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

Rule of Proportion Screenshots

iPad

iPhone

About Rule of Proportion

Proportions are no problem anymore. For this, only 3 of 4 variables must be entered. All calculations are stored in the history. The final solution can be shared.

[ Content ]
- the variables must be entered
- calculation with the rule of proportion
- history function that saves input
- detailed solution
- the entering of fractions and decimals is supported
- constants can be entered
- option to remove ads

[ Usage ]
- there are 4 fields for entering the values using a modified keyboard
- if you have entered wrong values or values are missing, the text fields are highlighted
- you can switch between the solution, input view and history by swiping and / or touching the buttons
- the entries in the history can be deleted or sorted manually
- if you select an entry in the history, it will be loaded automatically for the calculation
- the entire history can be deleted by pressing a key

What's New in the Latest Version 1.21

Last updated on Feb 14, 2024

Old Versions

Some people outside the EEA faced the issue of neverending purchase processes that pop up randomly. This should be fixed now.

Version History

1.21

Feb 14, 2024

Some people outside the EEA faced the issue of neverending purchase processes that pop up randomly. This should be fixed now.

1.20

Feb 12, 2024

Some users were forced into the purchase screen despite giving the consent for ads. This is fixed now.

1.19

Dec 14, 2023

- Onboarding was added
- app size optimized
- changes to comply with the GDPR

1.18

Nov 14, 2022

- minor improvements

1.17

Nov 5, 2022

- hindi and indonesian languages adde
- minor UI fixes
- minor fixes in in app purchase behaviour

1.16

Mar 27, 2022

- bugfixes

1.15

Mar 7, 2021

- added General Data Protection Regulation standards
- crash fix

1.14

Feb 18, 2021

Maintenance update with minor improvements.

1.13

Jun 6, 2020

Bugfix: The final solution is not covered anymore.

1.12

May 31, 2020

- enhancement of some math algorithm
- layout improvements
- general bugfixes
- fixing of support tools
- App Store updates
- dynamic realtime linking to latest math solvers

1.11

Apr 29, 2020

bugfixes and improvements

1.1

Feb 29, 2020

Localizations for chinese, french, japanese, korean, portuguese, russian, spanish.

1.0

Feb 1, 2020

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