Poor communications
Here’s the thing. If you’re going to update an app and make changes to the interface, to how it’s used, and to what things an end user can and cannot change, SAY SO IN THE APP. Put up a “see new changes here” banner. But whatever you do, do not make the changes and leave them for people to find. It will frustrate them unnecessarily at exactly the wrong time. Zero stars. Shipday’s customer service and programming is garbage.