Firebase phone auth verification limit

Question

Firebase says that for the Spark plan the limit for phone auth verification is 10k / month.

So, suppose 1000 users login using phone auth 5 times each (after signing out each time) then will it be counted as 5000 verifications or 1000 verifications?

Answer 1

I just tried and tested it out. The billing is calculated on the basis of the total number of phone verifications by the users. So in your case, if all 1000 users sign-out and then sign-in again and repeat this over 5 times, you'd have used 5000 verifications out of your monthly verification limit.

The number of verification SMS sent is however irrelevant and is not counted towards your monthly verification usage.

Hope this helps :)

Answer 2

It will be counted only 1000 verifications because they keep track of the number registered.

Answer 3

In my opinion:

The number of sent messages (sms) is considered, So 5000 is true.