AFAIK, you can't copy a trip from one phone to another.

In addition, keep in mind that it's a bad idea to plan your trip with the app. It's offline and is only updated once a month and is therefore not reliable enough for planning purposes. Use national planners and apps and for international planning, use the DB planner or DB Navigator app, which has roughly the same coverage as the rail planner app but is updated twice/week.

Thanks - I have been using the DB Planner and then just adding journeys into my trip on the app, and then transferring to the pass ready for travel - I suppose it just means that each of us will have to add the journeys into their passes manually, which isn’t the end of the world. Seems a bit clunky though when the app seems to offer duplication option (if it worked)

I think the duplication feature only works for passes on the same device.

I have added my pass to my phone, but have been unable to enter my partner’s pass as well. Does anyone have any advice please? 

If you want to add it on the same phone: go to My Pass and tap on the big + at the bottom right.

If that doesn't work for you, then please explain what "unable” means in this case.

Do note that by adding both passes to the same phone, you won't be able to travel separately.

Thanks, all sorted now!