This is a WhatsApp clone that I tried creating. I used Firebase to implement real time database. You can login in this using your E-mail or Google account. Features like changing your profile picture and updating your status are also implemented.
An Android Application for college students to get notified about the placement related updates in their college
Music player using Media Player and Google Firebase
Friendly chat uses firebase realtime database and storage, along with remote configuration to help you connect with your friends and text them as much as you want!
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