Database in web app hosting

[sullen oak]

So for example i have this web app that lets users record stuff they need to do.

Would my database still work if i deploy it using Render or something? Would people still be able to access information globally? (eg i log in to a account already registered on the hosted web app and can see the exact same information from other devices as well)

I want to know before i start that part of a more complex project so I don't waste time and can find a alternate solution if people say it won't work.

[lofty crest]

Yes, your database will work on Render if it's cloud-hosted. Users can access their data globally from any device as long as it's stored in a persistent online database and tied to their account through proper authentication and session handling.