Working time (date and time)

hello everyone,

I want to learn working time.
Maybe we push up start buton and system save a date and time (hr:mn)
and if ı push stop button, system save its time.
I want to write a list view all of them.
thanks.

Try searching the forum:

https://community.appinventor.mit.edu/search?q=duration

You can build on these samples: