What uses a credit
Credits meter just one thing: processing your incoming email, about one credit for each email your secretary reads, summarizes and sorts. Briefings, AI chat and draft replies don't cost credits, they're capped by a daily limit instead. Your balance is shown in Settings under Credits.
The only thing that uses credits
Credits meter one job: processing your incoming email. Each time a new email comes in, your secretary reads it, writes a short title and summary, and files it into Action Items, Highlights and FYIs. That work costs about one credit per email, so roughly one credit equals one email processed.
If you connect a busy inbox, your first sync will process a batch of recent emails and spend credits for each one. After that, only new mail that arrives uses credits, one at a time.
What doesn't use credits
Plenty of the AI in MailOver costs no credits at all:
So talking to your secretary, asking it to draft a reply, or reading your brief won't touch your credit balance. Those are capped by daily limits that depend on your plan.
Where to see your usage
Open Settings and go to Credits. You'll see your available credits, your monthly limit, and any purchased top-ups you've bought. Because processing is the only thing that spends credits, your balance is an easy way to gauge how much mail MailOver has handled this cycle.