Macro stats about install/uninstall rates of mobile apps are meaningless distractions when you're building a startup. Focus on what your audience needs and build that, whether it's a mobile app or a website.

I built a funny videos android app and website, android users discovered the app more easily and were more engaged with the app because they wanted to share videos from my app to whatsapp.

My more recent app is a web app because my audience are people doing work on their computer.

Audience guides the approach.