ValU
Depends
Confidence: Low
Confidence is low: the only evidence found is the vendor's own pages plus an App Store listing, with zero independent reviews.
Comparison
ValU vs Mercari
ValU and Mercari both land on Depends.
Mercari
Depends
Confidence: Medium
Use it if you casually buy or sell secondhand items and accept a flat 10% fee plus imperfect support.
| Compare | ValU | Mercari |
|---|---|---|
| Verdict | Depends | Depends |
| Best for | Thrift flippers pricing finds in-store | Casual sellers clearing closets |
| Who it's not for | Professional resellers needing guaranteed-accurate comps . accuracy is unproven | High-volume professional resellers |
| Privacy | No known public vulnerabilities found in the sources reviewed.² | Legitimate service overall, but two improper-authorization CVEs (CVSS 7.5) and a 2021 Codecov-linked data breach are on record.12 |
| Support quality | No support evidence found | Trustpilot and BBB report unhelpful support |
| Public sentiment | No verifiable user reviews for this specific app were found . nearly all online 'Valu' reviews belong to unrelated companies.³ | Users like the app's simplicity and authentication, but many complain about fee changes, support quality, and seller treatment.⁸ |
| Biggest gotcha | Guess: 'free, no limits' is a claim, not a contract . free scanners commonly add paywalls later¹ | New fee structure since January 2025 added buyer fees; some sellers say it's no longer worth cross-posting⁷ |
Pick ValU when
- Thrift flippers pricing finds in-store
- Casual eBay and Mercari resellers
- Sneaker, vinyl and trading-card collectors
- Garage and estate-sale shoppers
When ValU is not a fit
- Professional resellers needing guaranteed-accurate comps . accuracy is unproven
- Anyone needing certified appraisals for insurance or estates
- Teams wanting shared pricing or inventory tools . consumer app only
- Buyers who insist on third-party-reviewed products . none exist yet
Pick Mercari when
- Casual sellers clearing closets
- Secondhand bargain hunters
- Collectibles and hobby resellers
When Mercari is not a fit
- High-volume professional resellers
- Sellers needing responsive support
- Thin-margin items where 10% kills profit
Sources
official
- Valu . Product security pageval-u.appofficial
- valU: Resale Price Scanner . App Storeapps.apple.comofficial
- valU . Crunchbase (unrelated namesake, Egyptian fintech)crunchbase.comnews
- Mercari customer service reviews . Trustpilottrustpilot.comreview
- Is Mercari reliable? . Reddit r/Mercarireddit.comreview
review
- Mercari App Store ratings & reviewsapps.apple.comreview
- Mercari Review: Is Mercari Legit? . Crosslistcrosslist.comreview
- Mercari Fees Explained . Crosslistcrosslist.comnews
- Mercari Reviews and Ratings (2026) . Inquirerusa.inquirer.netnews
- CVE-2021-20835 . NVDnvd.nist.govsecurity
- CVE-2024-23388 . VulDBvuldb.comsecurity
- E-commerce giant suffers major data breach in Codecov incident . BleepingComputerbleepingcomputer.comsecurity
- Buyer Protection . Mercari Helpmercari.comofficial
- Is Mercari legit? . Avastavast.comnews