IssMan automatically stores all your data in the cloud whenever you have an internet connection (either WiFi or mobile connection). You can choose whether to do the automated backup every 10 minutes, 5 minutes, 1 minute or every 30 seconds.
When you log into your account on a new device all your data will automatically be downloaded. Just press the synchronize button (top left corner) and give it a few minutes. All data will be downloaded from the cloud and you can keep working unaffected.