Create application mobile for Android and IOS by Fires base, add Question and answer

App Mobile by name Wines to add Question and answer questions from all users
Every game start includes 30 or more questions, every user can answer question
In last 3 users stay and wines show 2 hours’ wines name and images
I need notification and show all users
Show all users now online
Increase and decrease seconds of waiting time to answer questions and loading time