Application insights charge for data ingested as the following page states:
Azure Monitor pricing
https://azure.microsoft.com/en-ca/pricing/details/monitor/
Azure Monitor log analytics and application insights charge for data ingested. We currently offer 2 log ingestion plans – Basic Logs and Analytic Logs – detailed below.
You will be charged accordingly to the amount of data ingested, so please see the pricing table in the link.
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