To use WeddingHappy on another device, please create an account.
Download WeddingHappy on your other device.
Tap the green Log in button from the Welcome screen.
Log in with your email and password that you set up on your other device. You should then see all your plans on the second device.
Please Note: These instructions apply to v3.x of WeddingHappy. If you are not running a 3.x version, please go to the App Store and update to the latest version now.