While you can install Fongo on multiple devices, login is limited to one device at a time. For example, if you are currently logged in on your iPhone and then you log in on your Android phone, you will be logged out on your iPhone. All incoming calls and texts will always arrive on the last logged in device.
Note: If you download and register the Fongo app on iOS, then you buy an Android and wish to use your Fongo account on it, you will need to contact our support team so they change your account type to the proper operating system.
Contact support: https://support.fongo.com/hc/en-us/requests/new
Note: If you have the Fongo Home Phone service, you will need a different account for your Analog Telephone Adapter (ATA).