Create a social network app, android and ios with firebase backend, text chat, video chat, simple profiles with a picture, and 5 star rating for rating each user, ie 5 star rating widget on other users profiles.
Bluetooth option for text chat and video call. GPS geolocation to see nearby users.
Although it has these additional features, the users profiles themselves are simple like twitter and it is more chat/video based rather then focused on the profiles and timelines.
I will need to create my own firebase account for the app, with admob ads ( my own admob code) on users profiles (on android).
The profiles are very simple bios with a picture that users upload to Google Firebase.