Apps to try
Dragon Dictation
Use your voice to dictate a text message or email, create a Facebook status updates or a tweet, and anything in between. Simply speak and see your text content appear. Note: This app is only available for iOS.
Forest App
This app is designed to help keep you motivated to staying on task and not get distracted or temped by being on your phone when you should be studying. Plant a tree and it will grow while you stay off your phone.
Stay Focused
This is a web extension that can be downloaded to help prevent you from being on time-wasting websites while you should be focused on your work.