AppBlock - Stay Focused is a Self Control android application that helps you (its users) to block distracting applications temporarily on your device so that you can stay focused in school or at work. The blocker app can get activated for a precise time and date, and once the pre-set time duration is over, the blocked apps can be used again.
There are a lot of great apps to stay productive out there, but my personal favourite is AppBlock. It's a really simple app, but it's really effective. You just add the apps you want to block for a certain amount of time, and then the app will block them for you.
I love using AppBlock to block social media apps when I need to focus on a project. It's really helpful to be able to block them for a set amount of time, and then unblock them when I'm done. I also like to use it to block games when I need to get some work done.
If you're looking for an easy way to stay productive, I definitely recommend checking out AppBlock.