Usage is metered in tokens: 1 token per discovered product URL, 1 per collected price and 1 per auto-matched SKU — roughly 3 tokens to fully track one product, then 1 per price refresh.
Pages that need heavier techniques cost slightly more, because a full browser render consumes far more of our capacity than a plain HTTP request. A single scrape is charged by the technique that actually succeeded, not the one that was attempted first.
Your balance is always visible in the top bar and every deduction is itemised in your account history. The allowance resets on the 1st of each calendar month — 100,000 on Free, 1,000,000 on Starter, 5,000,000 on Pro — and unused tokens do not roll over.
When the balance hits zero, runs pause and the app offers an upgrade. Nothing is lost: discovered URLs, prices and matches all stay, and everything resumes once you have tokens again.