Questions, problems or ideas for Voyage on iPhone, iPad or the web: write to app@edward-tu.com. Say which device you're using and what happened, and you'll hear back.
Voyage opens with a four-digit access code, given to you by whoever is organising the trip. Enter it on the first screen, or open the link they shared. A code opens the trips it was made for, and whoever holds it can see and edit them.
If a code stops working, it may have been changed or removed — ask the organiser for a new one.