It's not always the app software. I've had lots of instances where I had software that worked perfectly fine, but which then got serious issues after an os update. I can recall one instance with an android app which lost functionality after an os update, but with windows it's a constant worry and if any software breaks for someone, my first reflex has become to check if windows has been updated recently. I can't speak about apple devices, but if they make a change in the os, then it's bound to affect apps as well.