A super app like WeChat exist with an app store like Apple except it's all decentralised and not big corp controlled.

You can use the same logins for all the apps. Try with http://primal.net or http://nostur.com

https://www.scmp.com/tech/tech-trends/article/3236382/decentralised-social-media-super-app-elon-musks-dreams-already-exists-growing-interest-china