If you already know how to create Android Apps, you may want to look into the open source Android apps to boost your android development skills. By reviewing source codes of open source Android apps, you can learn how to build better apps.

Free Open Source Android Apps

To help you get started, we have a compilation of 10 Free Open Source Android Apps in this post below. As a learning purpose, use these free android apps source codes and improve your Android development skill.

1. Simple Calendar for Android

Simple Calculator Android APP - Open Source Android Apps

If you were looking to learn Kotlin, then this calendar app is probably one of the best ways to start. This app makes it perfect to get your hands dirty learning a completely new language for developing Android apps. You can also learn to make custom desktop widgets for Android.

Difficulty: Beginner

Download from Github | Demo – Play Store   

2. Amaze File Manager for Android

Amaze File Manager for Android - One of the best Open Source Android Apps

A file manager is a very common Android app that you can find on almost any Android device. Though building a file manager is quite difficult to get it right on all Android platforms and all devices. You can learn how to perform proper file handling on SD cards with this app source code.

Difficulty: Intermediate

Download – Github | Demo – Play Store

3. LeafPic – Photo gallery Android App

LeafPic - Photo gallery Android App

If you are wondering how Photo and Video gallery apps for android are made, LeafPic is one of the best open source gallery apps for Android you can try. If you are a beginner android developer, It is perfectly suitable for you to understand.

Difficulty: Beginner

 Download – Github | Demo – Play Store 

4. PhotoAffix – Android Photo App

PhotoAffix - Android Photo App

This open source android app is ideal for any beginner android developer who wants to learn the basics of Android Development. You can use this Android photo app to stitch photos vertically or horizontally. You can also learn to make some simple yet useful custom views which can help you to get your foundation ready so that you can later move on to creating some really complex views in future.

Difficulty: Beginner

Download – Github | Demo – Play Store

5. MovieGuide Android APP

MovieGuide Android APP

This is one of the best open source android apps which will help you to list the popular movies with their trailers and reviews. The app showcases some really cool development stuff like MVP, Uncle Bob’s Clean Architecture, gives the sweet taste of RxJava and dependency injection using Dagger 2.

Difficulty: Intermediate

Download – Github

6. Minimal ToDo

Minimal ToDo

This todo app source code is also recommended for a beginner developer. With this very simple yet project, you can learn most of the basic and fundamental aspects of Android development.

Difficulty: Beginner

Download – Github | Demo – Play Store

7. Timber – Music Player Android App

Timber - Music Player Android App

Timber is fully featured music player for Android. If you want to build your own music player or any music related app, then this is the project you need to look at. The project is very active in development, it might be a bit difficult for you if you are a beginner but it should be really interesting for any intermediate or advanced level Android developer.

Difficulty: Advanced

Download – Github | Demo – Play Store 

8. InstaMaterial – Instagram Clone App

If you are looking to improve your Material Design skills, then InstaMaterial – Instagram clone app source code can help you. InstaMaterial tries to replicate parts of the Instagram app in beautiful Material Design. There are lots of Material Design elements, animations and transitions used in this app which you can learn and implement in your own Instagram clone project.

Difficulty: Beginner

Download – Github

9. Travel Mate – Android Travel App

Travel Mate - Android Travel App

If you want to learn to develop a location-based Android app, then Travel mate is probably the best open source travel app to start with. You can start travel app project with this open source android app. The Travel Mate – Android Travel app provides users with all necessary features that most of the travel apps offer. From choosing the destination to making all the bookings and organizing the trip, all these features are already included in this free android travel app source code.

Difficulty: Intermediate

Download – Github

10. Pedometer Android APP

Pedometer Android APP

A simple, light-weight pedometer app which uses the hardware sensor to calculate the steps taken with almost no impact on the battery performance of the device. It is a good project to start learning step tracking, but the coding standards and design are not good enough to be followed.

Difficulty: Beginner

Download – Github