Smart MultiCalculator – All-in-One Android Calculator App

Smart MultiCalculator is a powerful and versatile Android application built with Kotlin & Jetpack Compose. It combines 29+ calculators across multiple categories into one clean, colorful, and professional app. Perfect for students, professionals, engineers, business owners, and everyday users.

✨ Key Features:

29+ calculators across categories: Basic, Scientific, Financial, Health, Engineering & Miscellaneous
Modern & responsive UI with gradient tiles and dynamic dashboard
Built using Jetpack Compose with clean architecture
Supports Android tablets, Fire Tablets, and Fire TV
Integrated AdMob (Banner, Interstitial, Rewarded, App Open Ads)
Integrated Unity Ads for extra monetization
“Go Ad Free” unlock option with rewarded ads logic
Lightweight, optimized performance, easy to customize
🛠 Technologies Used:
Kotlin – Primary language
Jetpack Compose – Modern UI toolkit
Navigation Compose – Smooth navigation between screens
Hilt – Dependency Injection
AdMob + Unity Ads SDKs

📦 What You Get:

Full Android Studio project source code
Clean, modular, and well-documented codebase
Documentation (PDF) for setup, configuration, and customization
Ready-to-publish app with AdMob & Unity Ads integration

🚀 Categories & Calculators Included:

Basic & Advanced: Standard, Scientific, Programmer, Graphing, Fraction, Matrix, Equation Solver
Financial: Currency Converter, Loan/Mortgage, Tip, Discount, EMI, ROI, Tax
Health & Fitness: BMI, Calorie, Body Fat, BMR
Engineering & Utilities: Unit Converter, Ohm’s Law, Physics Formulas, Fuel Consumption, Date & Age
Miscellaneous: Percentage, Statistics, Probability, Time, Zakat/Donation, Cooking Converter

This source code is ready to be published on the Play Store or customized for your projects. It is designed with scalability and monetization in mind.

✔️ Built with Kotlin 1.x and Jetpack Compose (modern UI framework).
✔️ 29+ calculators across categories: Basic, Financial, Health & Fitness, Engineering, Miscellaneous.
✔️ Clean and professional Material 3 inspired UI with gradient tiles & icons.
✔️ AdMob Integration – Banner, Interstitial, Rewarded, and App Open ads.
✔️ Unity Ads Integration as an alternative monetization option.
✔️ “Go Ad-Free” option (unlocked via Rewarded Ads).
✔️ Lightweight & responsive – works smoothly on phones and tablets.
✔️ Supports Android 9.0 (Pie) to Android 15.0.
✔️ Easy to customize colors, categories, ads, and layouts.
✔️ Complete documentation with setup guide.

Android Studio Jellyfish | 2023.3.1 or newer.

Kotlin 1.x (already configured in Gradle).

Gradle version 8.x or higher.

Internet connection for loading ads.

Google AdMob / Unity Ads accounts (for your own Ad IDs).

• Unzip the Source Code and open the project in Android Studio.
• Let Gradle sync dependencies automatically.
• Replace demo AdMob & Unity Ads IDs with your own in:
• app/build.gradle.kts
• ads/build.gradle.kts
• ads/src/main/java/.../AppOpenManager.kt
• Build and run the app on your emulator or physical device.
• Customize calculators, icons, and UI colors if needed (all organized in core-ui module).
• Generate a signed APK / AAB and publish to Google Play.