Thank you for your quick response. Unfortunately, it doesn't solve the problem as the volume settings, you are talking about, is the exact one I mentioned in my previous post. The fact, that notification sounds are much quieter than "normal" sounds, is observed consistently by us on iPads and iPhones, and according to this forum thread https://developer.apple.com/forums/thread/800487 it seems that it's quite well known to Apple engineers too. So, is there any solution how to make notifications (alerts) louder?