I want my iOS Swift app to run in the background. The things I want to run in the background are:
- Timer - that pings server periodically and retrieves data from it and then its displayed on the tableView.
- Audio - If a certain condition is encountered in the retrieved data, I play a local audio clip from the app via the avf framework.
The app is working as expected. I have done the following to allow backgrounding:
It does work in the background. However, is there any additional thing that I need to do? such that the app doesn't get rejected from the Apple App store.

“Timer That pings the server periodically” - that will make Apple hate you. And if Apple allowed it on the App Store, users whose battery you are emptying will hate you.
Read up on push notifications. No pinging, no energy use at all. Doesn’t even use WiFi or mobile data - your phone service provider sends you the push at a level below mobile data.