I think there’s some benefits to guided meditation in general. Different techniques (body scanning, breath counting, etc) aren’t necessarily obvious to people looking to meditate.

People also come to meditation for different reasons. Some want to chill out, others want to be more present in every day life.

I assume you’re well practiced so you’ll know that ultimately apps aren’t what you need for “real” meditation. I think they’re a good starting point for many though.