You have three marketplace apps on your phone, a crosslister on a free trial and a spreadsheet you stopped updating in August. Someone in a reseller group swears by a fourth app. Before you add it, ask a better question than "what is the best app for resellers?" Ask which job you are still doing by hand, and whether that job is costing you money.
This guide sorts reselling apps and tools by the job they do, with plan prices checked on October 18, 2026. One disclosure up front: Upcyclist publishes this comparison and makes one of the tools in it. We describe every product, ours included, by what it does and what it does not do.
Why there is no single best app for resellers
Every tool in this space is built around the job its maker gets paid for. Marketplaces earn a cut when an item sells, so their apps are excellent at listing, messaging and payouts. Crosslisting tools earn a subscription for moving listings between marketplaces, so that is where their features go. Neither has a reason to ask what you paid for the item.
That gap is your problem, not theirs. A payout screen shows money that landed. It does not show whether the item made a profit after what you paid, the supplies and the trip to get it. The tools need to fit how resellers work, from sourcing an item to recording its final profit. So the real question is which jobs you need covered and which tool covers each one cleanly.
The five jobs these tools do
| Job | Question it answers | Examples | Typical cost |
|---|---|---|---|
| Marketplace | Where does the buyer find it and pay? | eBay, Poshmark, Mercari, Whatnot | Free to list on most, fee when it sells |
| Pricing research | What do items like this actually sell for? | eBay Product Research | Free for eBay sellers |
| Crosslisting | How do I post one item to several marketplaces? | Vendoo, List Perfectly | Monthly subscription |
| Inventory tracking | What do I own, where is it and how long has it sat? | Flipwise, Upcyclist | Free tiers, then monthly |
| Profit tracking and bookkeeping | What did each sale actually leave me? | My Reseller Genie, Flipwise, Upcyclist | Monthly subscription |
Marketplaces: where the sale happens
Your marketplace apps are not optional, and they are not profit tools. They show the sale price and what the platform deducted. eBay, for example, charges most categories 13.6% of the total sale (item, shipping the buyer paid and sales tax) plus $0.40 per order over $10, or $0.30 at $10 and under. Poshmark charges $2.95 on sales under $15 and 20% at $15 and up.
To test a sale before you list, run it through the free eBay fee calculator, Poshmark fee calculator or Mercari fee calculator. If you are choosing between two platforms, our eBay vs Poshmark fees guide works through the comparison at several price points.
Pricing research: what items really sell for
Before you pay for a research tool, use the free one. eBay's Product Research (formerly Terapeak) lives under the Research tab in Seller Hub and in the eBay app. It shows up to three years of eBay sold data, including the accepted price on Best Offer sales, average shipping and how many sellers sold the item.
Its limit is scope. It covers eBay sales only. It also reports what sold, which is not a promise that your copy will sell at that price or that pace.
Crosslisting tools: one item, several marketplaces
A crosslister posts a listing to several marketplaces from one form. The better ones also detect a sale on one platform and pull the item from the others, which prevents selling the same thing twice.
Vendoo. US plans are Starter at $14.99 a month, Growth at $29.99 and Pro at $59.99, or $12.49, $24.99 and $49.99 a month billed yearly. Every paid plan includes unlimited items, and sale detection with auto-delist is included from Starter up. The 14-day trial requires a payment method. There is no free plan listed.
List Perfectly. Plans are Simple at $29 a month, Business at $49, Pro at $69 and Pro Plus from $99 to $249. Every plan includes unlimited listings and a money-back guarantee. Feature access climbs with the plan. Automatic sales detection starts at Pro, and auto-delist is a Pro Plus feature.
Both fit a seller who lists the same item on two or more marketplaces each week. If you sell almost everything on one platform, a crosslister adds cost without adding buyers. Whichever you choose, the crosslister moves listings. It does not tell you what each sale earned.
Inventory and profit trackers
Before choosing a tracker, work backward from how much resellers make a month to the per-item profit and sales volume you need to measure.
This is the category most sellers skip, and the one that shows whether reselling pays. Trackers split into two camps.
Synced trackers connect to a marketplace and pull sales and fees in automatically. Flipwise is built around eBay. It syncs active and sold eBay listings, adds relisting and repricing automation and lets you record sales from other marketplaces by hand. It does not crosslist. Pricing scales with store size. New members can use it free up to 24 listings, and a store with 100 to 499 listings pays $19.99 a month. My Reseller Genie is bookkeeping software for resellers, with Basic at $11.99, Premium at $16.99 and Ultimate at $22.99 a month. Its marketplace imports (eBay, Poshmark, Mercari and Whatnot) are on its top plan, and it offers a refund within 14 days of signup.
Manual-entry trackers record what you enter, from any source. Upcyclist is in this camp. You log the purchase, its cost and quantity, then the sale and its fees, shipping and other costs. Upcyclist calculates profit, margin and ROI from those numbers. It does not crosslist, import marketplace sales automatically or sync with any marketplace (yet).
Here is the fair case for each. Sync saves typing for a high-volume eBay store, but no marketplace knows what you paid, so you still enter cost on every item. Manual entry takes a minute per sale, but it works the same for eBay, a garage sale, a cash sale on Facebook Marketplace or a bundle split across three platforms. If most of your volume runs through one connected marketplace, sync usually wins. If your sales are spread out or partly offline, manual entry is the more complete record.
If you are not ready to pay for anything, the free reseller inventory spreadsheet and our guide on how to track reseller inventory and profit will get you started.
What a tool stack costs per sale
Subscriptions feel small one at a time. Run them against your profit.
These are hypothetical figures. Say you make 40 sales a month and average $18 profit per sale after fees, shipping and item cost. That is $720 a month.
- Stack A: a $14.99 crosslister plus a $9.99 tracker is $24.98 a month. That is about $0.62 per sale, or 3.5% of your profit.
- Stack B: a $69 crosslister alone is about $1.73 per sale, or 9.6% of your profit.
If you are keeping track, Stack B costs almost three times as much per sale. That only makes sense if its extra features save hours you would otherwise spend listing, or bring in sales you would otherwise miss.
You know a tool costs too much when you cannot name the hours it saves or the sales it adds each month. Before upgrading, write down what the next tier does that you now do by hand, and how long it takes.
Best reseller tools for three kinds of sellers
You are starting out. Use the marketplace app, eBay Product Research and a free tracker or spreadsheet. Do not pay for a crosslister until you are listing on a second marketplace every week. Your first money problem is buying items that don't pay off, and the free What Can I Pay? calculator addresses that before you spend anything.
You sell mostly on eBay at volume. A synced, eBay-focused tracker earns its fee here, because importing hundreds of sales by hand is slow. Add a crosslister only if a second marketplace brings meaningful sales.
You sell across several marketplaces and offline. You likely need a crosslister and a tracker. Pick a tracker that records sales from every source the same way, so your profit view is not missing your Facebook Marketplace and flea market sales.
The call flips when your volume changes. A seller who goes from 15 to 150 sales a month should re-run the per-sale math above, because a tool that was overkill at low volume can pay for itself at high volume.
Check these before you subscribe
- Price at your volume. Some tools charge by listings, some by store size and some by features. Price the plan you will be on in six months.
- Your data on the way out. Confirm you can export inventory and sales to a spreadsheet if you leave.
- Supported marketplaces. Check every platform you sell on, including local and cash sales.
- What you still type by hand. Every tool leaves something manual. For most, that includes your item cost.
- Trial terms. Note whether the trial needs a card.
If your main problem is knowing what you paid, what sold and what you kept, Upcyclist is built for that job. Log a purchase when you buy it, record the sale with its fees and shipping, and see profit, margin and ROI for that item. Planning Insights summarizes your completed sales to show top sellers and best margins. It does not forecast (yet). Upcyclist is free for up to 25 active items, and new accounts get 14 days of Pro with no credit card. Pro is $9.99 a month or $79 a year and adds CSV import, QuickBooks export and PDF reports. Check current plans on the Upcyclist homepage.
FAQ
What is the best app for resellers?
It depends on the job. Use your marketplace's own app to sell, eBay Product Research to check sold prices, a crosslister if you list on several platforms and a tracker to see profit after every cost. Start with the job that is costing you the most time or money.
Do I need a crosslisting app?
Only if you list the same items on two or more marketplaces regularly. On a single platform, a crosslister adds a monthly cost without reaching more buyers.
Are there free reseller tools?
Yes. Marketplace apps are free to use, eBay Product Research is free for sellers, and Upcyclist's free reseller tools include fee calculators, a buying-limit calculator and an inventory aging calculator with no signup.
Once your tools are sorted, the next decision is often which marketplace to add. If live selling is on your list, our Whatnot fees guide shows what a live auction leaves you after commission and processing.
