Does such a cloud database exist?

Question

Database

Wishlist:

• to work on all platforms (desktop, android and web)
  
• to be able to create forms
  
• import-export to csv or json
  
• free for one user
  

I found here a very good application for such tasks ninox, but after a month of trial they ask for almost 7000, still airtable, but there are no forms on android. Are there better options?)

Answer 1

MongoDB Atlas, nosql database. Free up to 1000 hits per day