Any way to try out the service without fully signing up for an account? There are a few features I'd like to see if it has (that almost every other iPad POS lacks) and I don't want to create an account just to sandbox....
One little quirk is that Groupon does NOT collect sales tax, so we're required to collect tax at the time of redemption.
We need our POS system to handle a payment of type "Groupon" for $X and then a second payment for $Y.
So - for example - if a product is $100 and tax is 5% (total due: $105), we need the total due to show as $105 (naturally), then apply the Groupon payment of $100 and show a balance due of $5, to be paid by credit card or cash.
Last I checked Square register doesn't support this, Shopkeep doesn't support this, and a few others I checked don't either. It's not rocket science - just the ability to accept 2 or more payments for each sale (Groupon + cash or Groupon + credit card) and have the balances get calculated correctly.