This app is properly designed to allow experienced users to make the most of their mobile devices, by including many essential features directly in the quick settings / notification panel.
It's the first project I've ever published on Google Play and now it's downloaded by more than 800.000 people.
A service to save time and avoid queues outside the shops. Not only does it include the possibility to book products with pick-up on site, but it also shows near stores on a map. Moreover, it manages multiple types of users. Fully documented, open source and available on GitHub.
A clean and modern wallpapers app, built to discover the most recent technologies in Android app development, like Android Jetpack and MVVM design pattern.