Even after choosing a discreet app icon but still when any notification comes , it shows that it is from Grindr and if someone clicks on that discreet app icon ...The word Grindr appears on the lock screen page instead of that discreet icon. So, if that happens then what is the use of providing discreet icon ?
The whole purpose people opt for discreet icon is that they don't want people to know that they are using "Grindr" but even after choosing discreet icon this word appears