Alpsport

The most basic functionality required for a serviceable POS system has been removed in the latest version, and is not even available on the Pro plan. Particularly baffling was the decision to remove the ability to create a new product from the POS app. This now has to be done by switching between different apps. When an item doesn't scan and you have a queue of customers waiting, you need to be able to process an ad hoc sale quickly. Shopify's solution is to perform a Custom Sale. Unfortunately, there's no way to allocate a cost to the Custom Sale, either at the time or after the fact, so the system assumes a 100% profit margin. Not good for reporting. If you have a physical shop, steer clear.

Simple, well functioning app with a very helpful support team. Definitely the best option I found out there.