For makers and small sellers who sell the same product on Etsy, Amazon, eBay, Shopify or their own site and want to know, before changing a price or running a promotion, which channel actually pays. It checks future prices and conditions; it does not analyse past sales.

Why this and not a fee calculator for one platform: you compare every channel you sell the product on side by side, returns are split into kept, resold and written off, and stepped fee tariffs are solved band by band to find the minimum price and the maximum ad cost per order. Your own minutes per order are counted exactly once, and promotions are checked before you run them. One payment, no subscription; no bank, accounting or marketplace connection; your data stays on your device; no AI — every result is an exact decimal calculation with “How it is calculated”, in 8 languages and any currency.

You enter the product once: purchase or production cost (in another currency if you pay it that way, at a rate you enter), packaging, other costs per order and your minutes per order. Then each channel with its price, shipping charged and paid, acquisition cost per order, fixed costs and planned orders, and every fee as its own line — fixed amount, percentage, what it is charged on, refund on return and, for stepped tariffs, the price band it applies to. Add your return assumptions, a target margin, a minimum contribution per order and the promotions you want to test.

You get, per channel, the order contribution across kept, resold and written-off returns, the contribution after your labour, expected month profit, the minimum price, the maximum acquisition cost and break-even orders — plus checks for a discount, free shipping, a coupon and a bundle, and the orders you would need after a discount to keep the same total. Every result shows how it is calculated. No AI — exact, traceable calculations. One-time payment, no subscription. It works on a phone and a computer, and your data stays on your device.