FireApp is a Real-Time complete chatting app with 'Tap and Hold' to Record and share voice messages . you can share images, audio, video, contact, even sharing your location!. Demo APK:https://bit.ly/2JA1eSg
NO need to buy an external server ,you can deploy it to Firebase Servers
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An extended license allows an item to be used in unlimited projects for either personal or commercial use. The item cannot be offered for resale "as-is". It is allowed to distribute/sublicense the source files as part of a larger project.