Know what every flip really made.
eBay shows you what something sold for. This shows you what you kept: after fees, shipping, ads, returns, and what you paid at the thrift store.
14 days free, then $5 a month. Cancel anytime.
Syncs with eBay, and imports sales from Mercari, Poshmark, Facebook Marketplace, Depop, Whatnot, or any spreadsheet.
Set it up once. Know your numbers forever.
No spreadsheets, and no guessing at fees.
Log your haul
Enter what you paid for a storage unit, a box lot, or a single thrift find. The app splits a lot's cost across every item in it and gives each one a SKU.
Connect eBay
Sign in with eBay once. Your sales come in automatically with eBay's exact fees, label costs, and ad fees. Read-only, so nothing on eBay changes.
See your real profit
Every sale, every batch, every month: what you actually made, which hauls paid off, and what's sitting on the shelf too long.
Built for people who buy low and sell on eBay
Every screen below is the real app, filled with a sample seller's numbers.
Your month at a glance
Profit this month, this year, and all time, with a goal to aim for. See your best and worst flips, and the stock that's been waiting too long, with a suggested price cut.
- 12-month profit chart
- Fees as a share of revenue
- Which batches still haven't paid for themselves

Know before you buy
Standing in the aisle? Scan the barcode to see what it's listed for on eBay, then see exactly what you'd keep after every fee. The receipt stamps it Buy it, Thin, or Pass.
- Break-even price and the most you should pay
- Fees calculated the way eBay does, including on sales tax
- What-if table for different sell prices

Tax time without the shoebox
Log supplies, storage, and sourcing trips as you go. At year end, get sales, cost of goods sold, every expense, and mileage at the IRS rate, ready for your tax preparer.
- Profit by category, by source, and by platform
- CSV downloads for every report
- Mileage rate set by each trip's date

Run the numbers on your last find
Type what you paid and what it sold for. This uses the same fee math as the app: eBay's 13.6% on the total including tax, plus the per-order fee.
Less than one thrift store mug a month
- Unlimited items and sales
- eBay sync, every hour
- CSV imports from other platforms
- Batches, inventory, and labels
- Profit Check with barcode lookup
- Expenses, mileage, tax summary
- Returns and bulk editing
- Backups you can download
Free for 14 days, then $5 a month, billed monthly. Cancel anytime from Settings and you won't be charged again.
Questions
Do I need to enter a card for the free trial?
Yes. Checkout is handled by Stripe, so we never see your card number. You won't be charged until the trial ends, and if you cancel before then, you pay nothing.
Can it change anything on my eBay account?
No. The app asks eBay for read-only access to your orders and finances. It can't list, edit, end, or cancel anything.
How does it know my real fees?
For eBay sales it reads the exact fees from eBay's finance records: final value fee, per-order fee, promoted listing fees, and shipping labels you bought through eBay. Before you buy, Profit Check estimates them the same way eBay calculates them.
I also sell on Mercari and Poshmark. Does that work?
Yes. Download your sales report from any platform as a CSV file and import it. The app matches the columns and skips sales you've already imported.
What happens to my data if I cancel?
You keep access until the end of the month you paid for. After that you can still sign in to download a full backup of your records. If you delete your account, everything is permanently erased.
Is this tax advice?
No. The year-end summary organizes your numbers for your records and your tax preparer, but it isn't tax advice.