Stop building from scratch. Launch a professional, feature-packed, and revenue-ready calculator app in days, not months. SmartCalc is the ultimate Android app source code, providing a complete, all-in-one toolkit built on a modern, future-proof Kotlin foundation. Whether you want to launch a single powerful utility app or an entire suite of niche calculators, this is the only source code you will ever need.

Why SmartCalc is the Best Investment

Built for Profit with a Powerful AdMob Engine

SmartCalc was designed from the ground up for monetization. It comes with the Google Mobile Ads SDK fully integrated, featuring three of the highest-earning ad formats. Simply add your own AdMob IDs, and you are ready to start earning.

• Banner Ads: Strategically placed in every activity for constant visibility.
• Native Ads: Seamlessly integrated within calculator layouts for a non-intrusive user experience.
• Interstitial Ads: High-impact, full-screen ads displayed at natural transition points to maximize revenue.

Future-Proof Native Kotlin Codebase

Don't invest in outdated Java projects. SmartCalc is built with 100% native Kotlin, the language recommended by Google for modern Android development. This means you get a codebase that is safer, more concise, and delivers superior performance. The clean, well-commented code is easy to understand, maintain, and extend, saving you countless hours of development time.

An 'All-in-One' App That Users Will Love

This isn't just a basic calculator. SmartCalc is a comprehensive suite of tools designed to solve everyday problems, making it an indispensable utility for any smartphone user. With a powerful search function to find any tool instantly and a "Favorites" feature for quick access to frequently used calculators, the user experience is second to none.

Incredibly Easy to Reskin & Customize

We provide a detailed, step-by-step guide that makes customization simple, even for those with minimal coding experience. Change the app name, package name, colors, and icons in minutes. The clean architecture ensures that you can rebrand and launch your unique app on the Google Play Store without any hassle.

Demo APK

Download APK

SmartCalc is packed with features that provide immense value to both the developer and the end-user.

Core Application Features

• Modern Tech Stack: 100% Native Kotlin, built with the latest Android Studio and Android SDK.
• UI/UX: A clean, modern, and intuitive interface that users will love.
• Full AdMob Monetization: Pre-integrated Banner, Native, and Interstitial ads for maximum revenue potential.
• Smart Search: A powerful search bar to instantly find any calculator within the app.
• Quick Access Favorites: Allows users to add any tool to a "Favorites" list for one-tap access.
• Dynamic & Expandable Architecture: The clean codebase makes it incredibly easy to add new categories and calculators in future updates.
• Settings Panel: A dedicated screen where users can manage app preferences, such as enabling or disabling the Favorites feature.
• Well-Documented Code: Clean, commented, and structured code for easy understanding and modification.

Calculator Modules (Grouped by Category)

1. Basic Math

• Basic Calculator: For all standard arithmetic operations.
• Age Calculator: Calculate age with precision down to the day.

2. Scientific

• Scientific Calculator: For complex calculations involving trigonometric functions, logarithms, and more.
• Quadratic Calculator: Instantly find the roots of quadratic equations.
• Matrix Calculator: Perform matrix operations, an essential tool for students and engineers.

3. Financial (The Money-Maker Category)

• Loan / EMI Calculator: An indispensable tool for calculating Equated Monthly Installments for loans.
• GST / Tax Calculator: Easily add or remove Goods and Services Tax or other taxes from any amount.
• Cash Counter: A simple utility to count currency notes and coins.
• Percentage Calculator: Perform all types of percentage-based calculations with ease.
• Investment Calculator: Project potential returns on investments.
• Profit / Loss Calculator: A crucial tool for business owners and salespeople.

4. Health & Fitness

• BMI Calculator: Calculate Body Mass Index to track health and wellness goals.
• Calories Calculator: Estimate daily calorie needs based on activity level.

5. Conversion

• Unit Converter: A comprehensive converter for various units including length, mass, temperature, area, volume, and more.

6. Geometry

• Area Calculator: Calculate the area of various geometric shapes.

What You Get (The Package)

• Full Android Source Code (Android Studio Project).
• Detailed Documentation PDF with Reskinning Instructions.
• Lifetime Free Updates: Receive all future calculators and features added to the app at no extra cost. This transforms your one-time purchase into a continuously growing asset.

Software Requirements

• Android Studio: Latest stable version recommended (e.g., Hedgehog | 2023.1.1 or newer).
• Android SDK: Latest version.
• Gradle: The required version is included and configured in the project files.

• Change app name, package name, and branding easily
• Replace AdMob App ID in string.xml with your own
• Add Privacy Policy URL