When creating a custom list on my iPhone 7Plus, after a few items have been entered, the last item is covered up by the on-screen keyboard when I am typing it.

It would be nice to choose how many times you will do a certain activity. For example, I'm going going to Disney park for 2 days, when I choose an activity it seems like it will assume I will only be there for one.

crowdsource the translation if needed (you could do even more languages that way)

See above

Open and close the individual Categories

It would be great to be able to edit the items vs. having to delete them and type them again

Please include a pop - out calendar when presented with choosing trip dates. Also, we need the ability to edit trip dates.

I would like the ability to turn off all sounds for the App.

Be able to duplicate a activity would be very handy. For example if you are you are going to the snow with children/partner, you could duplicate the "snow sport" activity and save it as a custom activity under their name rather then go in have to create it from scratch.

Since the German translation is rather bad, I would like to be able to choose the language on my own.

Is it possible, that my friends can add something or edite my list if I send it to them? Would be a great help for a group trip.

Be able to hide to "location" at the top of the packing list and the "customize List" button at the bottom of the list, they take up too much room. The customize feature is already in the drop down menu.