If you’re reselling in 2025, you need the right apps. Not a dozen apps that clutter your phone. Just the ones that actually help you find deals, price items correctly, and run your business without wasting hours every week.
I’ve tested basically every reselling app out there. Most are either outdated, overpriced, or solve problems you don’t actually have. Here are the ones worth downloading.
What Makes a Good Reseller App
Before we get into specifics, let’s talk about what actually matters in a reselling app:
Speed. You’re often making decisions in seconds at a thrift store or garage sale. An app that takes 30 seconds to load is useless.
Accuracy. Wrong pricing data is worse than no data. You need real market prices, not guesses.
Ease of use. If you need to watch a 20 minute YouTube tutorial to figure out how an app works, it’s too complicated.
Value for cost. Free is great. Paid is fine if it actually makes you more money than it costs.
The Must Have Apps for Resellers
1. eBay App
Platform: iOS and Android Cost: Free
This is non negotiable. If you sell on eBay, you need the app.
What it does well:
- Search sold listings while sourcing (check real prices fast)
- List items on the go with photo upload
- Track sales and messages
- Print shipping labels
- Manage offers and questions
The sold listings feature alone makes this essential. Standing in a thrift store wondering if something is worth buying? Pull up eBay, search the item, filter by sold, and you have your answer in 30 seconds.
2. A Good Price Checker App
Platform: Varies Cost: Free to paid options
A dedicated price checker app speeds up your sourcing significantly. Instead of manually searching every item, you can snap a photo and get pricing data instantly.
What to look for in a price checker:
- Image recognition that actually works
- Pulls data from multiple marketplaces
- Shows you actual sold prices, not just asking prices
- Works fast enough to use while sourcing
- Gives you a clear buy or pass recommendation
Some options pull in eBay comps automatically. Others analyze the deal you’re looking at and tell you if the price is fair. The best ones do both.
3. Poshmark App (If You Sell Clothing)
Platform: iOS and Android Cost: Free
If you flip clothing, especially women’s fashion and brand name items, Poshmark is probably one of your selling platforms. And their app is actually pretty good.
What it does well:
- Easy listing process with photo guidance
- Share to parties for visibility
- Quick offer responses
- Closet management
- Sales tracking
The social features matter on Poshmark. Sharing items, following users, and participating in parties all help your visibility. The app makes this manageable.
4. Mercari App
Platform: iOS and Android Cost: Free
Mercari is solid for general items that don’t fit neatly into other platforms. Their app is straightforward and listing is quick.
What it does well:
- Fast listing with barcode scanning
- Automatic pricing suggestions
- Integrated shipping
- Promotion features
- Clean interface
Mercari’s barcode scanner is useful for items with intact packaging. Point, scan, and you get pricing data instantly.
5. Facebook Marketplace (For Local and Sourcing)
Platform: iOS and Android Cost: Free
Facebook Marketplace works both for selling locally and for finding inventory to flip.
What it does well:
- Massive local buyer pool
- No fees on local pickup sales
- Notifications for saved searches (find deals fast)
- Integrated messaging
- Wide variety of categories
Set up saved searches for items you flip and turn on notifications. When someone lists a vintage Pyrex collection for $20, you’ll know before your competition does.
Inventory and Business Management Apps
Once you’re past the hobby stage, tracking inventory matters.
6. A Spreadsheet App (Google Sheets or Excel)
Platform: iOS and Android Cost: Free
Yeah, it’s not glamorous. But a spreadsheet is still one of the best ways to track your reselling business.
Track:
- Item purchased, date, cost
- Where you sourced it
- Selling platform and listing date
- Sale price and date
- Actual profit after fees
Most dedicated inventory apps either cost too much or don’t do anything a spreadsheet can’t do. Start simple. Upgrade if you actually need to.
7. A Photo Editing App
Platform: Varies Cost: Free to paid
Good photos sell items faster and for more money. A quick edit can make a big difference.
What you need:
- Brightness and contrast adjustment
- Crop and straighten
- Background cleanup or removal
- Batch editing for efficiency
Your phone’s built in editor often works fine. For more control, apps like Snapseed or Lightroom mobile are free and powerful.
Sourcing and Deal Finding Apps
8. Estate Sale Apps
Platform: iOS and Android Cost: Free
If you source from estate sales, you need an estate sale app. EstateSales.net and EstateSales.org both have apps that let you:
- Browse upcoming sales in your area
- See photos of inventory before going
- Get directions
- Save sales you want to hit
Looking at photos beforehand saves time. You can skip the sales full of 1990s particle board furniture and focus on the ones with actual vintage goods.
9. Garage Sale Apps
Platform: Varies Cost: Free
Apps like Yard Sale Treasure Map and Garage Sales by Map aggregate local garage sales so you can plan efficient sourcing routes.
Plan your Saturday morning:
- See all sales in your area on a map
- Read descriptions to identify promising ones
- Build a route that hits the best sales first
Getting to good garage sales early is half the battle. These apps help you figure out where to go.
Apps to Skip
Some apps get recommended constantly but honestly aren’t worth it for most resellers:
Barcode scanners for books. The Amazon FBA book scanning model is mostly dead. Unless you’re processing hundreds of books weekly, it’s not worth the subscription cost.
Paid pricing databases. Most of these are overpriced and the data is available free elsewhere. eBay sold listings give you the same information.
Cross listing apps with high monthly fees. These make sense at scale, but most resellers don’t sell enough volume to justify $30 to $50 per month.
All in one reselling apps that try to do everything. They usually do everything poorly. Better to use a few focused apps that each do one thing well.
How to Actually Use These Apps While Sourcing
Here’s my actual workflow at a thrift store:
Walk in, go to my target sections (men’s jackets, electronics, vintage items).
See something interesting. Check the price tag.
Open eBay app. Search the item. Filter to sold listings.
See what it actually sells for. Do quick mental math on profit after fees and shipping.
If the math works, buy it. If not, put it back.
The whole process takes maybe 60 seconds per item. After you’ve done it hundreds of times, it’s automatic.
For items I can’t easily identify, I’ll use a price checker app that does image recognition. Snap a photo, get pricing info, make the decision.
The Cost Question
How much should you spend on reselling apps?
If you’re just starting, you can absolutely keep costs close to zero.
The free versions of eBay, Poshmark, Mercari, and Facebook Marketplace are enough to list and sell. A simple spreadsheet can track your inventory and profits. And free estate sale and garage sale apps can help you find inventory.
But here’s the important nuance: the expensive part of reselling usually isn’t app subscriptions. It’s wasted time and overpaying.
One bad buy can wipe out a month’s worth of profits. And spending an extra 10 minutes on every decision adds up fast over a week of sourcing.
That’s when a great price checker becomes worth it. If an app helps you verify comps faster, avoid overpaying, and make confident buy/pass decisions, it can pay for itself quickly.
Underpriced is built for that exact moment: take a screenshot of a listing and get a fast, market-backed analysis (deal score plus comps plus recommendation) so you can move faster and make fewer mistakes.
Building Your App Stack
Don’t try to use every app. Pick the ones that match how you actually resell:
If you sell on eBay primarily:
- eBay app (listing and sold search)
- Price checker app (fast sourcing)
- Google Sheets (inventory tracking)
If you sell clothing:
- Poshmark app
- eBay app
- Photo editing app
- Price checker app
If you source locally a lot:
- Facebook Marketplace
- Estate sale app
- Garage sale map app
- eBay app (for pricing research)
Start with the basics. Add apps only when you have a specific problem they solve. Most resellers only need three or four apps to run their entire business effectively.
The Bottom Line
The best reseller app is the one you actually use consistently.
You don’t need 15 apps. You need eBay for pricing research and selling, a price checker for fast sourcing decisions (that’s where Underpriced fits), and maybe one or two platform specific apps depending on where you sell.
Everything else is optional. Keep your stack lean and only pay for tools that save time or prevent expensive mistakes.
Download the essentials, learn to use them fast, and focus on what actually makes money: finding good inventory and selling it at the right price.