Had to uninstall this app after using it for 3 months. It is missing a key feature to exclude specific postcodes which are costly to post to using courier services in the UK. I am in the UK and there are some postcodes which cost more to post to. Unfortunately this app doesn't have the ability to differentiate between some postcodes, for example PA3 postcodes and PA34 postcodes. For PA3 postcodes deliveries we offer free delivery, however PA34 is an expensive zone for most courier services and we charge about £6-£8 extra. So the issue is that the app picks up PA34 postcodes as PA3 and doesnt offer the correct delivery cost. PA34 postcodes should be excluded which the app cannot do. Apart from that, the app works really well. If developer could add ability to exclude certain postcodes, this app would be a 5 star for sure.