Can I throw in that once you get your stride with Streetcomplete you’ll love Every Door where you can add Shops and features pretty easily. They really complement each other.
The thing I like about mapcomplete is the ability to add photos and reviews for Bars and restaurants. that’s really good.
I find each application has its niche and I switch between them depending whether Im walking around or filling.in details.
Im also interested in Mangrove Reviews. Have to find more out about that.