Once you've signed up from one device you can then login to you account on any number of other devices.
When logging in on a different device, you'll be asked if you want to:
- sync with the new device.
- continue in a "read-only" mode
On laptops, desktops and tablets we recommend logging in to the Covve webapp (https://app.covve.com) which will make good use of the larger screen size while on other mobile phones you simply install the app and login to your account.