I have two Sonoff Bridge and several PIR and DW1 sensors. I think there are two main problems with the app, or at least no so well implemented.
1) Sonoff Bridge connected sensors doesnt show time triggered history in main Bridge page. You have to enter one by one. So, it´s very annoying to enter all sensors just to see which one had triggered the alarm.
2) When you receive a notification it display a generic message, so again I have to enter bridge and read sensors one by one until find which one had triggered.
So, better notifications whould be great, or at least keep time history in main page updated.
Also I unified notification system would be great.