Short answer: You can sendy count subscriber in Sendy by hand from its own interface, but it won’t repeat itself. On TinyCommand, add the Sendy Sendy Count Subscriber action to a workflow, map its 0 inputs from any upstream app, and it runs automatically every time the trigger fires. No code, and a free tier to start.
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Use these fields in downstream nodes for routing, logging, or error handling.
Any of these apps can fire this action as part of a workflow.