How to Choose the Best Cashier Apps?

[Suba]

When we open a shop or stall, we want to use a cashier or point of sales app which is a cash transaction software, but more sophisticated than a cash register. This cashier app can help the transaction recording process quickly, easily and accurately, and is also able to track sales/purchases and store transaction data.
Each cashier app will have different features, so how do you choose the best cashier app?