Underpriced.App
Google Lens
ScoutFlip
Underpriced AI
WorthLens.ai
FlipTip.ai
MarketplaceIQ.app
SoldComps
NativeBase
React Native
React Native Desktop
React Native UI Kitten
React Native Paper by Callstack
React Native Elements
Flutter
Shoutem
Underpriced is the #1 AI-powered profit checker app for resellers, thrift store flippers, and eBay sellers. Snap a photo or scan a barcode at any thrift store, estate sale, bin store, or flea market โ and get a complete deal analysis in under 30 seconds. What you get with every scan:
Real eBay sold comps (actual sale prices, not asking prices) Net profit after eBay, Poshmark, and Mercari fees + shipping Flip verdict: Flip It / Potential Flip / Pass Authenticity (legit check) + red flag detection Suggested list price + AI-generated selling guide
Works as a thrift store price checker for in-person sourcing AND as a Chrome/Firefox extension for online arbitrage โ screenshot any Facebook Marketplace or eBay listing and get instant resale profit analysis. Key features:
๐ธ Photo scan + barcode scanner for any item ๐ฆ Shelf Scan โ batch scan up to 7 items at once ๐ก๏ธ Legit Check โ catch fakes before they cost you ๐ผ๏ธ Photo Studio Pro โ background removal, flaw annotator, listing-ready crops ๐ FlipTracker โ full inventory tracker from purchase to sale ๐ Multi-currency support for resellers worldwide ๐ค FlipExpert AI chat for deal questions
Available on iOS, Android, Chrome, and Firefox. Used by 3,800+ resellers to find $1.2M+ in profit. Free plan: 5 analyses, no credit card required. Paid plans from $2.99/first month โ less than one bad buy at Goodwill. The best reseller tool for thrift arbitrage, retail arbitrage, and eBay flipping. Stop guessing at the shelf. Start flipping with data. โ underpriced.app
Underpriced.App NativeBaseUnderpriced.App's answer
Underpriced.App is built for one thing: helping you spot underpriced items fast and confidently. Instead of guessing from a single listing photo or a sellerโs description, it focuses on market-backed signals (comps, pricing patterns, and profit context) so you can decide โbuy / pass / offerโ in seconds. Itโs designed around real reseller workflowsโFacebook Marketplace and local deals, quick checks on the go, and repeatable decision-makingโwithout turning it into a bloated spreadsheet app.
Underpriced.App's answer
Most alternatives either (1) give generic โestimated valueโ numbers with little context, or (2) require a lot of manual searching and interpretation. Underpriced.App is streamlined for speed and clarity: itโs meant to reduce hesitation and prevent overpaying by surfacing the right signals at the right time, then turning those into an actionable recommendation. Itโs also built to scale with youโfrom casual thrifters doing occasional flips to serious resellers who need consistent, repeatable results.
Underpriced.App's answer
Underpriced.App is for deal-hunters and resellers who want to make smarter buying decisions: people who browse Facebook Marketplace, thrift stores, garage sales, liquidation, and retail arbitrage opportunities and need a quick way to validate price and profit potential. The core audience is practical and time-constrainedโbuyers who donโt want to do 10 tabs of research for every item, but still want decisions backed by real market behavior.
Underpriced.App's answer
Underpriced.App comes from a simple pain point: flipping and deal-finding isnโt hard because there are no dealsโitโs hard because itโs easy to overpay, miss red flags, or waste time doing research that doesnโt translate into a clear decision. The app was created to make that moment of uncertainty disappear by turning โIs this actually a deal?โ into a quick, repeatable process grounded in comps and market reality.
Underpriced.App's answer
Underpriced.App is a modern web-first product with mobile support: React + Vite for the UI, Tailwind CSS for styling, Capacitor for mobile app packaging, Firebase (Auth + Firestore) for user/accounts and data, and Vercel serverless functions for API endpoints and integrations (like billing and webhooks). Itโs optimized for fast iteration and reliable deployment while keeping performance strong.
Underpriced.App's answer
Full-time resellers running consistent daily sourcing Part-time flippers who source on weekends and evenings Facebook Marketplace buyers trying to avoid overpaying Thrift and garage-sale shoppers who want quick price validation Retail arbitrage beginners learning whatโs actually profitable Small resale operations scaling from โside hustleโ to steady revenue
Seems to be the best app for resellers and thrifting. Great for analyzing profit and tracking inventory.
Based on our record, NativeBase seems to be a lot more popular than Underpriced.App. While we know about 22 links to NativeBase, we've tracked only 1 mention of Underpriced.App. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
โข What would actually make you open an app like this mid-thrift-store-aisle? Ios AppStore: https://apps.apple.com/us/app/underpriced/id6759008101 Thanks for reading, happy to answer any questions about the build! - Source: Hacker News / 5 months ago
Gluestack, like any other customizable UI library, is built to make styling less cumbersome. It comprises a set of themed and unstyled components easily integrated across different platforms and devices. Originally, Gluestack was a part of NativeBase, a component library for both React and React Native. With performance and maintainability in mind, NativeBase was split into two parts, focusing on a universal... - Source: dev.to / over 2 years ago
Just like the other libraries mentioned in this article, Gluestack is another unstyled component library. Originally a part of NativeBase, the developer team created this library to prevent bloat and enhance maintainability of the project. - Source: dev.to / almost 3 years ago
KumaUI : Another relatively new contender, Kuma uses zero runtime CSS-in-JS to create headless UI components which allows a lot of flexibility. It was heavily inspired by other zero runtime CSS-in-JS solutions such as PandaCSS, Vanilla Extract, and Linaria, as well as by Styled System, ChakraUI, and Native Base. ### ๏ปฟVue. - Source: dev.to / almost 3 years ago
NativeBase is a collection of essential cross-platform React Native components. The components are built with React Native combined with some JavaScript functionality with customizable properties. NativeBase is fully open-source and has 18,000+ stars on GitHub. - Source: dev.to / over 3 years ago
CSS-based UI libs don't make sense on mobile; your new options include NativeBase, React Native Elements and others). Some web-based UI libs do have RN siblings though - such as React Native Material and React Native Paper (for Material-UI), and tailwind-rn (for Tailwind). This just means new decisions to make, some learning, and new paradigms for how to use the new libs. - Source: dev.to / over 3 years ago
Google Lens - Discover information about something by taking a photo
React Native - A framework for building native apps with React
ScoutFlip - ScoutFlip helps thrift resellers, eBay sellers, and online flippers instantly know if an item is worth buying. AI-powered resale value estimates, sell-through rates, and buy/pass decisions in under 10 seconds.
React Native Desktop - Build OS X desktop apps using React Native
Underpriced AI - Snap photos of your finds, get instant AI valuations, and create optimized listings for eBay and more.
React Native UI Kitten - Customizable and reusable react-native component kit
