How to make a mobile accounting of ice cream sales on the street (Android, iOS)?

Question

Android

Hello!
It is planned to sell ice cream from wheels on the beaches. The range is limited. Tablet account required. Ideally, the ability to accept payments through a tablet (banks give out such small things).
If anyone has seen this somewhere, please post a link.
I wonder what's relevant in this topic right now? Adequately?

Answer 1

Here's what you need
. There really is no acceptance of payments.
(Don't be offended, this is a joke)