https://arstechnica.com/gadgets/2020/07/amazon-prime-video-will-finally-offer-one-of-netflixs-most-basic-features/

At long last, Amazon Prime Video is catching up to competitors like Netflix, Hulu, and Disney+ with a key feature: user profiles. The feature is rolling out in the mobile and set-top box versions of the Prime Video app starting today.

The feature allows multiple people sharing an Amazon Prime subscription to maintain separate watch histories and watch lists. Additionally, Amazon has made a distinction between user profiles for kids and profiles for adults, with different rules. Users can configure up to six profiles in any mix of children's and adults' profiles. All this is rolling out starting today, but it won't reach all users right away.