Am/pm is not used where I'm from so it's not as intuative for me as 24 hour time format.
Here in Germany we only use 24 hour format. am/pm is not know by most German people.
24hr on every device and service except Ryver currently on my workstation. I have tested in the Android application as well, which does not respect system time settings either.
It wont use the default settings because all the apps are just web browsers wrapped in the application to appear as native. With that being said, it means the local settings are not even considered let alone used. This would only work as a global admin setting or individual user setting (preferably both) with the way Ryver works.
Customer support service by UserEcho