Inside the app
A closer look.
About this app
Made for a clear purpose.
Calculates marketplace fees, promoted listing costs, shipping, packaging, taxes, discounts, return allowance, and final seller profit with editable presets.
Built for a focused job instead of a recurring subscription, Marginlane includes:
- Listing Calculator - Fee Presets - Return Scenarios - Profit Ledger
Everything works locally with no account, no ads, no analytics, no tracking, and no developer-operated backend. Your work stays on your device until you explicitly export or share it.
One purchase includes every version 1.0 feature. There are no in-app purchases or locked tiers.
Marketplace formulas are editable estimates; verify current fees before a listing decision.
