No subscription, no account. The free plan works forever. If you outgrow it, Pro is seven dollars, one time, and covers every future Pro feature too. You can also try Pro free for 14 days first.
Chrome removed built-in payments from its store years ago, so like every paid extension, the purchase happens outside the store. Ours goes through Gumroad. Here is the whole flow:
Card, PayPal, whatever Gumroad supports in your country. Takes a minute.
Gumroad shows a license key on the receipt and emails it to you. Check spam if it hides.
Extension, Settings, Get Pro, "Activate your license". Paste the key, press Activate.
Pro unlocks on the spot. Yes, there is actual confetti. We could not resist.
The fine print, in plain words.