ylishi.tools

Ylishi Tools is a free Amazon seller toolkit built around one idea: you should see every cost before it eats your margin. The FBA fee calculator covers referral, fulfillment and storage fees plus the ones most tools skip - inbound placement, prep, returns and peak-season surcharges - across 10+ marketplaces. Add a profit and ROI estimator with break-even analysis, PPC and keyword tools, a listing grader, and an AI assistant that answers fee questions in plain English using 2026 rate data. No account, no paywall.

Key features

• ✓FBA fee calculator across 10+ marketplaces
• ✓Profit & ROI estimator with break-even analysis
• ✓Hidden cost detection: inbound, prep, returns, peak surcharges