Opsview Mobile is compatible with all currently supported version of Opsview, this is currently 5.0+. Full details regarding supported version of Opsview can be found here.
Opsview Mobile supports Android version from 5.0 and iOS versions from 9.0.
Opsview Mobile requires your Opsview Username in order to login and use Push Notifications, if you are unsure of your username you can easily find it by logging in and going to your Profile.
In order to set up Push Notifications you will need to first enable Push notifications on both your device and your Opsview server. Full instructions can be found here.
If you have a signed certificate and are using an Android device you may need to add the certificate to your device, the following instruction can be found here.