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Where the money goes
One bill line per post: what it charges for, why it grows faster than your traffic, and the change that brings it down. Every price comes from the provider's own pricing page, with the date we checked it.
dynamodb · aws · pricing
DynamoDB Pricing: Why Writes Cost More Than You Think
DynamoDB pricing explained with real numbers: request units, item size rounding, indexes, on-demand vs provisioned, and the storage and backup lines.
firebase · firestore · pricing
Firebase Pricing: What the Blaze Plan Charges For
Firebase pricing line by line: Firestore's per-document reads, the daily free quota, Storage downloads, Functions CPU time and phone sign-in SMS.
aws · lambda · pricing
AWS Lambda Pricing: Where the Bill Actually Comes From
AWS Lambda pricing in plain numbers: requests, GB-seconds, the cold starts AWS started billing in 2025, Arm, and the API Gateway line next to it.
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