What does the zombie assistant do?

The zombie will wander your shelter for however long you pay for and will collect generated resources for you and a few other tasks. It doesn't unfortunately progress the birth and growing up of new dwellers but it can be very useful if you are training dwellers, fighters in the gym for example. The zombie will clear their updates status and let them move on so you can leave dwellers in training and come back to them being fully levelled up.

OS if you have training to do or are not able to check into the game more than once a day then it can be useful.