ColorFul Calculator for Android

App snapshot

Colorful Calculator is an Android utility from Stan Studios that brings a lively design and many convenience features to basic and advanced arithmetic tasks. The core app is available for free, and a paid Donate edition is offered for users who want to support the developer.

Key features

• Assign results to quick-access or custom icons and paste values onto them for fast retrieval.
• Two distinct input styles: Classic mode for simple operations and Expression mode that shows the entire calculation.
• Several color themes for the keypad so you can pick a look you prefer (four button-style skins included).
• A persistent history panel that drops down for reviewing past calculations.
• Automatic fixes for common typing mistakes, for example inserting missing closing parentheses.
• Option to have tactile or audible feedback on button presses (vibration or click sounds).
• Supports percentage entries (%) and handles them correctly within expressions.
• Automatic font resizing to keep numbers readable as the expression grows.
• Landscape orientation is supported for wider layouts.
• Option to prevent the screen from sleeping while using the app.

Input modes and display

Expression mode displays the full formula at the top of the screen so you can verify long calculations, while the simpler Classic mode focuses on single-step arithmetic. Percentage handling is built in and behaves as expected inside expressions.

Smart entry and history management

The app watches your input and corrects typical errors automatically (for example, adding a right parenthesis when needed). A drop-down history makes it easy to revisit, reuse, or edit prior calculations.

Appearance and interaction

Customize the look by choosing one of four keypad skins and change how the app responds when you tap buttons — enable vibration or a beep. The app also adapts the font size automatically to keep everything visible and supports landscape orientation for a broader view.

Power-user options

Keep the screen on during long calculation sessions, and store frequently used values on dedicated icons for single-tap access. These small conveniences make repetitive or lengthy tasks faster.

Support and alternatives

If you appreciate the app, consider buying the Donate version to back the developer. For other sources or modified versions, some users look to third-party repositories such as HappyMod (free).