Understanding Firestore Pricing

Question

Before creating a new app I wanna make sure I get the pricing model correct.

For example in a phonebook app, I have a collection called userList tha

Answer 1

If you actually have to pull an entire collection of 50k documents, the question you likely should be asking is how to properly structure a Firestore Database.

More than likely you need to filter these documents based on some criteria within them by using the query WHERE clause. Having each client device hold 50k documents locally sounds like poor database planning and possibly a security risk.

Each returned document from your query counts as 1 read. If there are no matches to your query, 1 read is charged. If there are 50k matches, there are 50k reads charged.

For example, you can retrieve the logged in user's document and be charged 1 read with something like:

db.collection('userList').where('uid', '==', clientUID)

Note: As of 10/2018 Firestore charges 6 cents (USD) per 100k reads after the first 50k/ day.