We have just gone live Globally and have found that users on Android are having a very differnt experience to those on Apple.
How is it best to report the issues? For example a user who has an LG V30+ Android Ver 8.0.0 Oreo has had to delete and reinstall the app everytime he wants to use it!
Are you android users using the PIN to login or are they using a password? Some of our users had issues before they added a PIN to their account.
Navigate to Profile --> Mobile Registration to set up a PIN.
There are user guides and a video tutorial here:
But, if it's beyond the scope of training/PIN, I would definitely submit a Concur help request with specific issues - logins of the users having issues and screenshots, if you have them.