One plan. Billed by Shopify, on the invoice you already pay.
Up to 10 price lists, unlimited tagged customers, quantity tiers, the checkout Function, and the theme app block.
Free tier: one price list, scoped to up to 25 products. No card until the trial ends.
Prices in USD. Shopify applies local taxes on app charges. Cancel any time from the app or your Shopify admin — cancelling keeps the app working to the end of the period you paid for.