I really like the app and wanted to give 5 star. Unfortunately, the customer support is non-existant. There is no chat feature in the app and sending tickets via contact us function is no good too. I sent an email enquiry 4 days ago (and again this morning) but haven't heard any response from them. Update: Still no response from their email but finally gotten a response from their facebook operator even though they said fb is not the channel that handles queries for this app.
I would have give it 5 stars easily but the developer seems to have lost interest in improving the app, i would be glad to even pay some amount monthly as long as they would take this more seriously. The app needs some improvements but for a free app is already really good to start with! It has everything to be one the best rewards app at shopify but for reasons mentioned above it cannot become that. It needs more availability from the developer.