Standard Calculator
Perform everyday arithmetic operations in a straightforward calculator interface.
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Android Application · Personal Project
Smart Calculator
A multi-mode Android calculator built with Kotlin and Jetpack Compose, combining everyday arithmetic with scientific functions, calculation history, and memory controls.
Kotlin
Jetpack Compose
Room
ViewModel
Smart Calculator
sin(30)
0.5
Example calculation
MC
MR
M+
M−
sin
cos
√
x²
7
8
9
÷
4
5
6
×
1
2
3
−
AC
0
.
+
=
Illustrative UI preview — replace with actual screenshots for a verified product view.
Project Overview
One calculator, multiple ways to solve a problem
Smart Calculator is an Android application project designed to provide standard arithmetic and scientific calculations in a single interface. The implementation uses a Jetpack Compose UI and separates calculator functionality into maintainable components.
The current feature scope includes scientific operations, a calculation-history experience backed by Room, and calculator memory controls. The app is intended to be useful for everyday calculations as well as technical and learning scenarios.
Key Features
Designed for daily and scientific calculations
A feature-focused overview of the current project scope.
Scientific Functions
Includes sine, cosine, square root, square, logarithm, natural logarithm, factorial, and power operations.
Calculation History
Room-backed history functionality helps retain and revisit previous calculations.
Memory Controls
MC, MR, M+, and M− controls support clearing, recalling, adding to, and subtracting from calculator memory.
Separate Calculator Modes
The interface is designed to support calculator types with a standard calculator as the default mode.
Modern Android UI
Built with Kotlin and Jetpack Compose for a native Android user experience.
Scientific Calculator
Beyond basic arithmetic
Scientific operations extend the calculator for students, developers, and technical users. Confirm the supported angle mode and edge-case handling in the app before publishing these details as final specifications.
Sine (sin)
Cosine (cos)
Square root (√)
Square (x²)
Logarithm (log)
Natural log (ln)
Factorial (n!)
Power (xʸ)
Example validation
Input
sin(30)
Expected result in degree mode
0.5
The project's previously tested sine example returned 0.5 for sin(30). Include a screenshot or test evidence if you publish this as a project achievement.
Technology Stack
Native Android implementation
The project uses Android development technologies to structure the interface, application state, and local calculation history.
Kotlin
Primary application language
Jetpack Compose
Declarative UI toolkit
Room
Local database for history
ViewModel
UI state and lifecycle-aware logic
Testing & Quality
Validate the important calculation paths
The project has had successful build and feature-test iterations, including a sine-function check. Use the checklist below to guide future manual and automated validation; only mark cases as passed when you have tested them on the current build.
- Basic arithmetic and operator precedence
- Scientific functions and angle mode
- Division by zero and invalid input
- Factorial limits and negative values
- Memory controls: MC, MR, M+, M−
- Save, display, and clear calculation history
- State restoration after rotation or app restart
- Small-screen layout and accessibility
Potential Next Steps
Ideas for future releases
These are possible enhancements, not claims about existing functionality.
Unit Conversion
Add common engineering and everyday unit conversions.
Programmer Calculator
Explore binary, octal, decimal, hexadecimal, and bitwise operations.
Export & Share
Offer safe sharing or export of selected calculation history.
Accessibility
Improve TalkBack support, contrast, and touch target sizing.
Localization
Consider regional number formatting and additional languages.
Automated Tests
Expand unit and UI tests for operations and edge cases.
Explore More Work
Interested in the implementation?
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