TikTok Shop has 45+ fee types (referral fees, transaction fees, affiliate commissions, FBT fulfillment, co-funded campaign deductions) that make it nearly impossible to know your real profit per order.

I built a Chrome extension that overlays profit calculations directly onto TikTok Shop Seller Center. It also monitors your Shop Performance Score (SPS) - a 0-5 rating that controls access to Flash Deals, ads, and affiliate marketing.

Tech stack: Manifest V3, content scripts, Chrome local storage (zero data leaves your device).

This is my 4th product attempt in 30 days. First 3 failed because I couldn't solve distribution. Chrome Web Store gives organic discovery that landing pages + Reddit never could.

Free, no tracking, open to feedback.