I was making a qr attendance app with reference from
https://youtu.be/hynTBp-3toQ but rather than in and out time I want to insert' p'for present and 'a' for absent in the Excel sheet. How can I do this?
Welcome Srijan.
Here are links to App Inventor discussions about attendance apps Search results for 'attendance' - MIT App Inventor Community
One of them may help you decide what to do.
Otherwise post an image of your Blocks here to get specific advice.