Hey there Christine! Welcome to planDisney. You've brought us a great question and I am happy to help!
You'll be happy to know that
Disney Genie+ can be easily used with a group. I do this with friends quite often when we go to the parks together. I have my family and our tickets all together on my Disneyland account, but I also have added the tickets of friends who we go with regularly. You are able to have the same tickets on multiple accounts, so they also have their tickets on their account. This allows them to have control of their tickets to scan into the parks digitally on the Disneyland app, as well as for mobile order their own food. When we head into the parks we purchase Disney Genie+ for ourselves on our own accounts, but then I take control of making the Lightning Lane suggestions after that with my account. I simply select all of our tickets and then see what attraction we want to get a Lightning Lane for. This makes sure we are all getting them at the same time together.
Don't forget that Disney Genie+ service lets you enjoy unlimited
Disney PhotoPass digital downloads for the day. This means you can get a headstart on that memory book with digital downloads of participating attraction photos and group shots from PhotoPass photographers throughout the parks.
Thanks again Christine for stopping by planDisney. We hope your Disneyland Resort trip is magical in every way!
Carrie