Reseller Inventory App or Spreadsheet? An Honest Review

Every reseller hits the same wall. The bin of stock grows, the sales come in from three apps, and one evening you can’t say what you paid for the jacket that just sold. That’s usually when the search for a reseller inventory app starts.

We make one, so take this review with that in mind. We’ll still tell you when a free spreadsheet is the better choice, and when a cross-listing tool earns its monthly fee. You’ll get the fields any tracker needs, the prices we checked on 22 October 2026, and one worked example showing how a spreadsheet formula can quietly overstate your profit.

What any inventory tracker has to record

Whether it’s an app, a spreadsheet or a notebook in the glovebox, your records need the same things. Your tax return will ask about them, and so will you, the first time a sale looks too good to be true:

• What you paid, with the date and the shop. This is your cost of goods, and only you know it.
• Where it’s listed. So you can pull it everywhere when it sells.
• The sale price, date and marketplace. Include what the buyer paid for shipping.
• Every fee. Marketplace fees, ad fees and processing.
• The label and supplies. Mailers and tape are small, but they’re yours to claim.
• The miles. Sourcing and post office trips, logged at the time.

Marketplace reports cover the sale and the fees. None of them know your cost or your miles. That gap is the whole job of inventory tracking for a reseller.

Is a spreadsheet enough for reselling?

Often, yes, and plenty of sellers never need a reseller inventory app at all. The IRS doesn’t ask for any particular software. It asks for records that show the money in and out:

A reselling spreadsheet costs nothing and stays yours forever. If you sell under about 20 items a month on one marketplace, sit down with it weekly and never miss a row, it can carry you for years. Our free reselling spreadsheet template has the twelve columns that matter, with the profit formula built in.

Where spreadsheets go wrong is the fee column. Lots of home-made sheets work out eBay fees as 13.6% of the sale price. Here’s that formula beside the real fee on one sale:

That’s $2.35 of profit that doesn’t exist, on one fleece. Across 300 sales a year it adds up to hundreds of dollars of income you’d report but never had. A spreadsheet is only as right as its formulas, and marketplaces change their fees (Whatnot changed its whole commission structure in September 2026). Our post on eBay selling fees walks the real rule line by line if you want to fix your own sheet.

What a reseller inventory app adds

“Reseller inventory app” covers two quite different kinds of tool, and mixing them up is how people end up paying $30 a month for something that still can’t tell them their profit. Before you sign up for anything, work out which job you’re hiring it for: getting items listed, or getting the money straight.

Cross-listing apps

Vendoo and Crosslist are built to list one item on many marketplaces at once and delist it everywhere when it sells. If you list 100 or more items a month across several sites, that saves hours. Inventory tracking comes with the territory, since they hold every listing.

Profit ledgers

A ledger doesn’t list anything. It records what each item cost, what it sold for, the fees, the label and the miles, and adds it all up for the tax year. Hustl is one of these. It works out marketplace fees with each site’s own rules, so the fee column is never a guess.

An eBay inventory tracker built into a cross-lister and a ledger can sit side by side. Plenty of sellers use a cross-lister to list and a ledger, or a spreadsheet, to keep the money straight.

Spreadsheet, cross-lister or ledger: the prices

The jump in price follows the job. Cross-listers do heavy lifting (posting to Poshmark, Mercari, eBay and the rest), and they charge for it. A ledger does arithmetic and keeps records, which is why it costs less.

Which one fits how you sell?

• Under about 20 sales a month, one or two marketplaces: a spreadsheet or a free ledger. Don’t pay for anything yet.
• Busy on several apps, mostly clothing: a cross-lister earns its fee in saved listing time. Check it records your cost per item, or pair it with a ledger.
• You drive to source and want the deduction: you need a mileage log, kept at the time. See our mileage deduction guide.
• Tax time is the pain point: a ledger with a year-end report, so whoever does your return gets cost of goods, fees and miles in one place.

Here’s a realistic case. A part-time seller is weighing up a reseller inventory app. They list 25 items a month on eBay and Poshmark from Saturday thrift runs. A cross-lister would save them maybe an hour a week. Their real problem, though, is April: no record of what anything cost. For them, $49 a year on a ledger fixes more than $150 a year on listing software. Flip the numbers for someone listing 200 items a month and the answer flips too.

Mistakes that make any tracker useless

1. Entering costs later. If you don’t write the price down on the day, you’ll guess. Log it in the car park.
2. Tracking sales but not stock. Unsold stock isn’t an expense yet. See the cost of goods sold guide for why.
3. Copying fees by hand. Pull them from the marketplace report or let a tool work them out.
4. Keeping two systems. One source of truth. Two sheets drift apart within a month.

Starting this week

Start simple. Download the reselling spreadsheet or open a free Hustl ledger, and add only what you buy from today. Back-filling a year is miserable and rarely accurate. When the free 30 items fill up, or you want mileage and the year-end report, Ledger is $49 a year. Read our record keeping guide for the rest.

Prices from Vendoo’s pricing page and Crosslist’s pricing page, checked 22 October 2026. Record keeping rules from the IRS. This isn’t tax advice.