App notifications. This word evokes stress, doesn’t it? We are overloaded with messages of all kinds, and when you add another source of information flow when installing a new app, it can become too much. But some apps, like health apps, do not have any choice. They have to function like Neville Longbottom’s Rememberball. So, we devoted this infographic to an actual issue - how to build a non-annoying notification system.