I am creating my first app.
My case is:
I want to create a financial control for festivals.
The user will receive a bracelet at the entrance of the party where there will be a QR Code.
When the user arrives he will be directed to go to the cashier to carry his bracelet with credits to use at the bar and conveniences
It would be 3 steps.
1- The User needs to log into the app to identify which type of function:
-Box -> will recharge the bracelet
-Bar will read the QR code (where you can check the current balance and discount what the customer asks for.
SPECIAL DETAILS
-I need it to work on an offline network between cell phones and a physical server.
-I need to know how to query and add or subtract user values
-I know almost nothing about databases
Could someone help me by giving tips on where to search for the necessary material?
I found a lot of information about firebase and tinyDB but I couldn’t digest it all