How to make an app in which if the user submits an task and if the task submitted is correct they will be rewarded with some coins in the app

MIT App Inventor Help
2

This could be done using a Google Sheet, with these columns:

  • Teacher Name
  • Assignment Details
  • Student Name
  • Submission datetime
  • Submission URL of video on YouTube or Loom
  • Judging datetime
  • Payment given

See FAQ Section: Google Sheets
to start