They will tell you that the refresher only comes in one size. So the extra 0.80 is just a waste of money since the app isn't programmed to make the refresher only come in its standard size.
They call a sausage pizza a "custom pizza" they then charge you $10 for it compared to the normal price of $6.80 for pepperoni. Be aware of the price difference if you make a big order like for a pizza party. The difference will surprise you and stack up fast.
I ended up paying $130 for sausage pizzas for my son's birthday party and did not notice the reason for the price to be so high until i checked later since they don't give receipts unless you ask. Now you know too.