I was tracking my resale items in a spreadsheet and it kept falling apart in exactly the ways spreadsheets fall apart. Bundle math was unreliable, receipts lived in my email, photos were scattered across my phone, and the profit numbers always felt slightly off. At some point I decided fixing the spreadsheet wasn’t worth it and building a proper tool was.
FlipSite replaced the spreadsheet. Now I use it every day.
What’s in it
The dashboard shows nine KPI cards and four charts at a glance — total inventory value, realised profit, average ROI, hold times. Items flagged as keeping are tracked separately so they don’t drag down the resale numbers; a record of what something is worth sits next to the record of what you made flipping other things.
Everything in your inventory lives in the items list. You can browse it as a table with sortable columns and profit per row, or switch to gallery view and navigate by photo — which is usually how you actually think about physical stuff. Each item holds its category, condition, buy and sell price, platform, status, dates, notes, and any attached files like receipts or manuals.
Bundles
The part that finally made the spreadsheet unusable: buying a collection for one price and selling the pieces separately. FlipSite handles this with bundles — you record the kit purchase once, then each child item tracks its own sale while the whole thing accounts for what you originally spent. You get the actual number you walked away with, not a rough guess.
Analytics
The analytics page lets you filter by date range and platform, and every number on the page responds. The hold time vs profit scatter makes it immediately obvious whether flipping fast or sitting on things is working better for you. A cumulative profit line compared against a steady-pace baseline shows whether your returns are accelerating or leveling off. Useful for questions like “how did camera gear do last quarter” or “is this platform actually worth the fees.”
The personal touches
Eight color themes, each with independent light and dark mode — from Midnight Drop and Cold Brew to Neon Petal and Colorful 80s. Six font options. None of this is necessary for a resale tracker, but it made it considerably more enjoyable to open every day.
The live demo is at flipsite-three.vercel.app — log in with demo@flipsite.app / demo1234 to poke around a seeded inventory with real bundle examples and realistic prices.