Check a variable from a different screen

I’m doing a money system game where on the first screen, you can click the canvas to gain money, but on a another screen you can check that amount of money. The money is a global variable by the way. I’ve seen some stuff about something called tinyDB but I don’t really know how it works, if that’s the only option, could someone explain it to me? I only have a few days to work on this before its due. Whatever help is appreciated.

Start with

http://www.appinventor.org/bookChapters/chapter22.pdf

then look at the intro articles at

Once you decide on a TinyDB tag for the money ('MONEY'?), you don't need the global variable at all. You can just drop the value directly into tinyDB under that tag and get it out just as easily, without the confusion of having two places to keep it in.

My Amarjeet

I have 5 years experience in mit app inventor

I am professional devloper

You use tiny db

If any error found then contact me

(Mod edit - personal info removed)