Custom Formulas

9.4

BinaryEarth

4.60

71 reviews

5,000+
Downloads

$3.99

Easily set up your own computational app! Create formulas and run them as needed

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Custom Formulas compared with similar apps

Common keywords of similar apps

Values Updated Output File Tool Target Sdk Custom Create Computations Input Fed Displayed Group Variable Categories Surveying Interest Order Variables Number Linear Fixed Association Bug Formulas App Multiple Formula Easily Easy Calculator

Keywords missing from this app

Excel Math Functions Practice Maths Examples Mathematics Integration Equations Properties Function Learn Geometry Data Calculation Ai Angle Trigonometry Trigonometric Identities Series Vlookup Table Algebra Transform Complex Basic Offline Time Users Circle Calculus Students Key Sum Sheets Generate Shortcuts Keys Recent Tax Find Google

About Custom Formulas

Custom Formulas is a tools app developed by BinaryEarth.

Download Statistics

Custom Formulas has been downloaded 5.5 thousand times. In the last 30 days, the app was downloaded 5 times.

User Ratings

Custom Formulas is rated 4.60 out of 5 stars. The rating is based on 71 ratings.

App Information

Custom Formulas costs $3.99 to download. The APK download size is 1.40 MB. The latest version available is 9.4. The last update was on December 5, 2025.

Technical Requirements

Custom Formulas requires Android 4.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play August 2014.

Description

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. There are also a growing number of formulas available to easily download directly in the app from a web sharing hub. Current categories include health, finance, and surveying.

A formula group can be exported or emailed, allowing you to share your creations with other users of the app.

The results from multiple computations using the same formula can be saved to a CSV file for later viewing in a spreadsheet. You can also choose to compute the sum of the formulas for a range of values of one of the input variables using the sigma button.

In addition to evaluating formulas, there is also a calculator tool and a linear equation solving tool on the main page menu.

You can view the online help here: https://www.binaryearth.net/CustomFormulasHelp/

Recent changes:
9.4: Fixed issue with file association.
9.3: Updated to target Android SDK 35.
9.2: Fixed a bug with file association for .cf files.
9.1: Allow entry of formulas in Linear Solver without having to insert *'s between coefficient and variable name.
9.0: Updated calculator tool.
8.9: Updated to target Android SDK 34.
8.8: Updated to target Android SDK 33.
8.7: Bug fix.
8.6: Added min(), max(), and avg() functions which each take two values.

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More data about Custom Formulas

Price	$3.99
Total downloads	5.5 thousand
Recent downloads	5
Rating	4.60 based on 71 ratings
Ranking	Not ranked
Version	9.4
APK size	1.40 MB
Number of libraries	24
Designed for Android	4.0+
Suitable for	Everyone
Ads	NO ads

App Performance Report

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Google Play Rating history and histogram

Downloads over time

Custom Formulas has been downloaded 5.5 thousand times. Over the past 30 days, it has been downloaded 5 times.

Changelog of Custom Formulas

Dec 5, 2025UpdateVersion 9.4
Jul 8, 2025UpdateVersion 9.3
Jun 17, 2025UpdateVersion 9.2
Sep 6, 2024UpdateVersion 9.1
Jul 11, 2024UpdateVersion 9.0
Jul 8, 2024UpdateVersion 8.9
Feb 26, 2024Price IncreaseNew price: $3.99 ($2.99)
Aug 2, 2023UpdateVersion 8.8
Feb 17, 2023UpdateVersion 8.7
Feb 27, 2023Price IncreaseNew price: $2.99 ($0.99)
Feb 22, 2023Price DropNew price: $0.99 ($2.99)
Jan 14, 2023UpdateVersion 8.6
Dec 6, 2022Price IncreaseNew price: $2.99 ($1.49)
Nov 22, 2022Price DropNew price: $1.49 ($2.99)
Nov 12, 2022UpdateVersion 8.5
Oct 17, 2022UpdateVersion 8.3
Oct 8, 2022UpdateVersion 8.2
May 23, 2022Price IncreaseNew price: $2.99 ($1.99)
May 9, 2022Price DropNew price: $1.99 ($2.99)
Mar 31, 2022UpdateVersion 8.1
Mar 10, 2022UpdateVersion 8.0
Jan 31, 2022Price IncreaseNew price: $2.99 ($1.99)
Dec 7, 2021UpdateVersion 7.9
Dec 6, 2021Price IncreaseNew price: $1.99 ($0.99)
Dec 4, 2021UpdateVersion 7.8
Nov 22, 2021Price DropNew price: $0.99 ($1.99)
Nov 19, 2021UpdateVersion 7.7
Sep 21, 2021UpdateVersion 7.5
Aug 2, 2021Price DropNew price: $1.99 ($2.99)
Jun 21, 2021Installs5,000+ installs
Jun 21, 2021Price IncreaseNew price: $2.99 ($2.49)
Jun 2, 2021UpdateVersion 7.4
Apr 22, 2021Price DropNew price: $2.49 ($2.99)
Apr 21, 2021UpdateVersion 7.2
Jan 18, 2021UpdateVersion 7.1
Dec 18, 2020UpdateVersion 7.0
Oct 24, 2020Price IncreaseNew price: $2.99 ($1.99)
Sep 24, 2020UpdateVersion 6.6
Aug 22, 2020UpdateVersion 6.0
May 12, 2020UpdateVersion 5.6
Jun 19, 2020Price DropNew price: $1.99 ($2.33)
Apr 24, 2020Price IncreaseNew price: $2.33 ($1.99)
Feb 19, 2020UpdateVersion 5.5
Oct 31, 2019UpdateVersion 5.2
Dec 25, 2019Price IncreaseNew price: $1.99 ($0.99)
Dec 24, 2019Price DropNew price: $0.99 ($1.49)
Oct 11, 2019UpdateVersion 5.1
Oct 8, 2019Price DropNew price: $1.49 ($1.99)
Aug 28, 2019Price IncreaseNew price: $1.99 ($1.49)
Jul 22, 2019Price IncreaseNew price: $1.49 ($0.99)

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Developer information for BinaryEarth

BinaryEarth

info@binaryearth.net

Website

N/A

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Comments on Custom Formulas for Android

★★★★★ Shane Hurley · Jun 25, 2022

It was a hard decision to buy it even with it on sale given I likely had 30 calculators on my android anyway. However, I didn't have a program-your-own formulas app, so I got it. One of my first formulas tried was statistics based sum of a series and discovered SUM function not supported, so I guess asking for more support of math functions is where to start asking as far as improvements. Developer added SUM immediately on my behalf. It's about 2yrs later, and I don't regret buying it one bit.

★★★★★ Aaron Kelly · Dec 3, 2025

The ability to do custom formulas with input and output have helped me a ton at work, no more messing around with a calculator and less chance of making a mistake.

Google Play Rankings for Custom Formulas

This app is not ranked

Technologies used by Custom Formulas

Custom Formulas is requesting 6 permissions and is using 25 libraries.

Permissions

Development tools

test access to protected storage

Network communication

view network connections, full network access

Storage

modify or delete the contents of your USB storage

Hardware controls

control vibration

Extra

com.google.android.providers.gsf.permisson.READ_GSERVICES

Ad network libraries

AdMob

Social libraries

None found

Development tools

Android Jetpack core

Android Architecture Components

Android Jetpack VersionedParcelable Firebase Android Library Icon

Firebase

Android Jetpack Annotations Android Jetpack Widgets Android Library Icon

Android Jetpack Widgets Android Jetpack AppCompat Android Library Icon

Android Jetpack AppCompat AndroidX Loader Android Library Icon

AndroidX Loader Android Jetpack Media Android Library Icon

Android Jetpack Media Google Cloud Messaging (GCM) Android Library Icon

Google Cloud Messaging (GCM)

Android Transition Support Library

Android Support Library collections

Android Support VectorDrawable

AndroidX Legacy: Support Library core utils AndroidX Cursor Adapter Android Library Icon

AndroidX Cursor Adapter

AndroidX Local Broadcast Manager

Android Support Library Print

Android Support Library Document File

AndroidX Legacy: Support Library core UI

Android Support Library Async Layout Inflater AndroidX Multi-Dex Library Android Library Icon

AndroidX Multi-Dex Library Google Maps SDK Android Library Icon

Google Maps SDK Google Analytics Android Library Icon

Google Analytics

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