A control room for Etsy · Shopify · Amazon sellers
Your business control room, on your phone: true net profit per product after 2026 fees, ads, shipping and returns, then prices, promos, unit cost, restock timing and the marketing. Eleven tools, one account. You build the store, the numbers keep watch.
No card, nothing to install. Enter your email, get a login code, the 7-day trial starts. Then from $9/month.
The problem
Most sellers calculate profit as price minus cost. In 2026, a $12.99 sale also pays for:
Figures from the Margin Audit with 2026 fees. This one is the best seller.
Per unit, before the 15% referral fee and before your ads. On a $12.99 item that is 27% of the price gone before you count a single cost of your own.
How it works
Fees last updated: 6 September 2026. The fee tables are maintained whenever a marketplace changes its rates, and you can edit them per account. Questions: [email protected]
Screen recording of the app (Indonesian UI), 52 seconds: Margin Audit → Breakeven → Dashboard → Promo.
Screen recording of the app (Indonesian UI), 52 seconds: Margin Audit → Breakeven → Dashboard → Promo.
Build tools
They connect: unit cost feeds margin, margin feeds promos, products feed restock. Enter once, use every week.
Net profit per product after every cost. HEALTHY / THIN / VERY THIN / LOSS status, plus a summary of which products are quietly losing money.
Minimum price for your target margin, max ad spend per order, and breakeven ROAS. The number no ad dashboard shows you.
20% sale plus offsite ads, still profitable? Get the number, not a feeling.
Materials, labor, overhead and waste become the true unit cost. One click sets it as COGS in the margin audit.
When to reorder, how many units, and the cash you need, from stock, sales velocity and supplier lead time.
Six months ahead: profit on paper vs cash in the bank. Know which month gets tight before it happens.
Etsy, Shopify plans, Amazon FBA size tiers and FBM. Different on your dashboard? Edit it, applies to your account only.
Captions, product descriptions, follow-up DM scripts, replies to bad reviews, 7-day content plans.
Know before you stock up, not after the boxes pile up. See whether your product is rising or already past its peak, which variant people are starting to search for, where demand is strongest so your ads stop wasting budget, and which marketplace is busiest for it. Need ideas? This week's rising products are one click away, then straight into the Margin Audit to check the profit.
Export your orders and income reports, drop them in the app, and the numbers stop being estimates: real net profit per product, the fees actually charged, returns, settled cash, plus monthly expenses (staff, rent, utilities) for your true store profit. No laptop needed: the export works from a phone in desktop-site mode, 2 minutes. Files are read on your device; buyer names never leave it. Every plan, trial included: last 30 days; the 1-year plan the full 12 months.
Bookkeeping without spreadsheets: type one line like a chat, “sold 3 tees 255k”, “paid electricity 300k”, “took 500k personal”, and the entry fills itself: type, category, and net profit when the item matches one of your products. In the evening tap Close the day for a summary, a streak and a shareable daily card. Works offline, syncs when you are back online.
If you run ads
Your ad dashboard shows ROAS. It doesn't show whether that ROAS is profitable. That depends on a number that's different for every product.
Everything left after costs and fees on the $24 tee. Spend more than this per order and the sale loses money.
Your Etsy Ads, Amazon PPC or Meta ROAS on that product must be above this. A fine-looking 1.5× is a loss.
Pricing
The difference is how long, and how deep: trial and monthly see the last 30 days, the 1-year plan the full 12 months plus new tools first. Renew any time, remaining days stack, never reset.
No card, no charge: every audit + Dashboard + 30-day seller import + AI assistant 5/day. Everything you enter during the trial is kept.
Repricing, an ad review, or planning this month's restock. 30-day import, Trend Check included. AI 30/day.
Get 1 monthFull 12-month import, Cash Book first, data saved all year, fees auto-updated when platforms change rates, AI assistant 60/day, Trend Check, and new tools land here first. Launch price until Sep 19, 2026.
Get 1 yearOne selling season: Q4, a launch, or three months re-pricing every product. $6.33/month. 30-day import, Trend Check included. AI 30/day.
Get 3 monthsLeave your email for new tools and promos. The $39 launch price is locked for you until Sep 19.
Card / PayPal via Lemon Squeezy, VAT handled at checkout. After paying you're sent to the app: enter the email you paid with and a login code arrives. Trial days left are added, not lost. Up to 2 devices per account.
Who it's for
FAQ
No store needed. Open app.sellerprofitos.com on your phone and tap Install (Android) or Share → Add to Home Screen (iPhone). You get a TOS icon on your home screen and a full-screen app that updates itself.
Expected. Fees vary by category, plan, country and programs. That's why the Fee Table is editable per account. Change the number and every tool follows.
Every audit, the Dashboard, the Fee Table and the AI assistant at 5/day, no card needed. Trend Check switches on when you pick a plan. After 7 days nothing is charged: the app simply shows the plans, and your data is kept. One trial per email.
Captions, product descriptions, DM scripts, review replies, 7-day content plans, from the product details you type. Daily quota: 5 (trial), 30 (1 and 3 months), 60 (year). It never invents claims that aren't in your input.
Whenever a new tool ships, 1-year members use it from day one. Monthly and 3-month plans get the same tool 2–3 months later, with the date shown in the app. Never locked forever, just later.
You type one line instead of filling a form, and because it is linked to the Margin Audit, a sale that matches one of your products counts net profit, not just revenue. Close the day each evening for a summary and a streak, and share the daily card if you like. 1-year plan first (other plans from 9 October 2026).
Research tools (Jungle Scout, DataPinter and the like) tell you what sells and what competitors list, and cost a lot more. Seller Profit OS works on the products you already sell: 2026 fees, ads, shipping, returns, breakeven price, promos, unit cost, restock, cash. Trend Check here is Google demand data, not marketplace sales data. They work together: find the product there, make sure it earns here.
One account, up to 2 active devices. For teams or agencies, email for a team price.
Digital product, access starts the moment you pay, so no refunds. But if you open it and get stuck, reply to the email and I'll get you unstuck.
Seven days free. Then $9 a month, cheaper than one wrong promo.