Cheapest hosted database options for 1M read & writes per day?

Building a tool for free users so don't want to spend bucks on database. Looking for a hosted database with generous free tier for read/write ops.

I should mention that read and write operations are expected to surpass 1M/day.. Firestore is a no-go (expensive).

If there's no NoSQL option available I could also look into SQL DB given it's hosted.