Which database is best and cheapest for mobile app
Mysql is the best
Google spreadsheet is free and fast
Use baserow, it’s free for now but in my opinion the integration of it in projects and management of data are quite beautiful!
In community we have multiple talented people’s are there. They are using different database depending upon their needs. You cannot expect free service for large number of data’s if so somewhere you will get struck.
Some people use their mysql or even their own database. Make your own choice.
In your case you can try for googlesheet which best for beginners as well as looking for free for large data’s… spreadsheet free upto 1200. Baserow too free but blocks need to set up properly.