Download Custom Formulas apk 2.1 free for Android smartphone

20 May
Custom Formulas

Posted by BinaryEarth in Tools | May 20, 2016 | 4 Comments

Apk file size: 233.0 KB

This powerful app lets you create your own custom formulas and then perform computations using them by prompting you for the input values.

This app is easy to use, but unlike simpler apps, multiple entered values can be fed into multiple formulas and multiple output values can be displayed. The output of one formula in a group can be fed into the next by using the same variable name.

Related formulas can be grouped into categories to make them easy to find. e.g. Maths formulas, Surveying formulas, Loan interest formulas etc.

The order of variables displayed to the user can be changed, as can the number of decimal digits of precision shown in the output fields.

Three example formulas are pre-installed with the app. In order of increasing complexity they are: slope percentage, compound interest, and point scale factor.

A formula group can be exported to a text file. Other users of the app can then import it, allowing your creations to be shared. An open forum where you can share formulas is available here:!forum/custom-formulas

Note: Do not use "e" or "pi" as variable names since these are pre-defined constants. This app uses the JFEP library. See the following page for the list of supported functions: (Plus int(), round(), ceil(), and floor() have also recently been added).

On-line help for the app is available here:

Whats new

    2.1: Added a preferences page with option to enter values with scientific notation e.g. 1.32e-10 (this just shows full keyboard instead of numeric).
    2.0: Prevent duplicate input vars being created within a formula group. Make a precision of 0 mean no decimal places.
    1.9: Added link to on-line formula sharing formula from main menu.
    1.8: Added menu options to import and export a formula group. (Now requires permission to access SD card).

BinaryEarth part of our Tools and have average installs from 100 to 500. Last Update May 20, 2016. Google play rating is 93.3333. Current verison is 2.1. Actual size 233.0 KB.

Download custom-formulas.apk 233.0 KB


Sean Franzen

Just what I was looking for... I work in an industry that's full of different custom formulas. I wanted an application that I could easily create these formulas and modify as necessary. There are tons of calculators and mathematical applications, but none that could present the data in a simple form until I found this. The developer has been extremely responsive. Excellent!

Maxim Tsupko

Great app but could be improved I really like this app but I wish there was an option to choose a constant from drop down menu. For example I would like to choose a gear ratio to be an input into a formula and not type in long number just choose "gear ratio A" from a drop down list made earlier.

John Ryan

Excellent Easy to use. Ability to have multiple formulas connected together sets it apart.

Simon Woods

Good app, nice clear interface. I like that it doesn't come loaded with a ton of built-in formulas to scroll past - I only see the stuff I need. One issue, there seems to be no way to input or output variables in scientific notation making it hard to use very small or very large numbers.

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