title: Firebase billing: Do extra daily reads roll over? Do free reads get used first?
body: <p>Firebase spark allows a project to have 50K firestore reads a day. We are planning on moving to the blaze plan, because we expect to exceed that limit on high traffic days. My question is how these extra reads work. It's $0.06 per 100K documents, but are these daily? What I am asking is that if I use 50K of my free reads halfway through the day, and then I am incurred a charge of 6 cents to read more, do I get to continue using these reads the next day if I only used a couple of these, or will I get charged 6 cents again if I run through the daily 50K and need more reads?</p>