Hi @Gate6India ,
Welcome to Google Cloud Community!
Yes, you are correct! Firebase Spark plan has limits for read, write and delete operation since it is free only. Regarding the Firebase Blaze plan, it has no limits, you will only be billed for what you use beyond the free daily quota. It is a pay-as-you-go plan. See Firebase pricing and billing example for your reference.
Also, as mentioned by @AlexET , you can join the discussion and group regarding Firebase topic on theFirebase community.
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