Something that’s often forgotten by companies/people developing their first app is analytics. It’s something I usually recommend if it’s not already in the app requirements or specification. It’s always easier to add this as you go rather than add at the end or after the app has been released. Why add analytics?
I have also found that deeper analytics can also sometimes be used to aid support and resolve device or network specific problems. In these cases it’s best to have some kind of ’switch’ so you can turn deeper analytics on and off. However, you might need to balance the need for data against app information privacy