I use MyMovies Pro to catalog my discs. I use my iphone to scan the bar code of the disc and I’m done. Except for the version I have on my iPad Pro. The way the app keeps the ipad in sync is to download my entire data base of discs, which takes close to 10 minutes. What is bad about that is the app has to remain in the foreground. If I bring up another app or close the ipad, the download stops. That’s rather inconvenient. I wrote the developer via support request and within 2 hours I had a reply. He said apple requires that only small things be done in background and downloading my dB of movies is not a small thing. Well apple violates that with their App Store and doing app updates which can take a long time. Of course, he who makes the rules can violate them when they want. However, I don’t buy the developer’s answer. Something like this is made for the background. I will go on to say that I love the app and will continue using it. That 2 hour response time is typical, and is often faster. Props to the developer. Are there apps that do heavy duty work in the background?