Zap.store is built on nostr identity layer, which other appstores lack. This means that on my follows list, I can check if e.g. nostr:npub108pv4cg5ag52nq082kd5leu9ffrn2gdg6g4xdwatn73y36uzplmq9uyev6 uses, recommends, or verifies sha256 of a particular app. 

This may sound like a trivial change, yet it changes appstores to function more in line with recommendations from friends and family in real life 🌶️