CoinValuationApp tests coin valuation apps for homeowners, estate executors, and donors who need defensible appraisals for insurance riders, probate filings, and tax documentation — not marketing estimates.
Who We Are
This work started with a probate filing. One of us inherited a moderate collection of U.S. coins and faced a deadline: provide a formal valuation for court. We tried three different apps. Each returned a different total value; none of them showed the ranges, condition caveats, or grade breakdowns that an appraiser or insurance company actually wanted to see. We spent weeks rebuilding what the apps should have given us in the first place. That frustration became the foundation for this site. We believe homeowners, executors, and donors deserve coin valuation tools that produce documentation-ready outputs, not just pretty estimates. Most coin apps treat valuation as a consumer feature. We treat it as a compliance tool. That distinction matters when your insurance company wants to see the supporting data, or when you're filing taxes on a charitable donation worth five figures.
Methodology
We test each coin valuation app against a fixed portfolio of 34 coins: Lincoln wheat cents (1909–1958), Mercury dimes (1916–1945), Morgan dollars (1878–1921), Standing Liberty quarters (1916–1930), and modern bullion coins (American Silver Eagles, 2010–2024). Each coin in our test set has a known grade, documented provenance, and at least one third-party certification where applicable. We spend 60 to 90 hours per app over 8 weeks, testing how each tool handles the same coins and comparing outputs to published dealer prices, PCGS/NGC market reports, and independent auction results. We re-test quarterly and after any app update that claims improved accuracy or valuation logic. Our goal is to understand not just what total value an app calculates, but how transparent it is about its methodology and condition assumptions.
Our Standards
We score apps on whether they show realistic price ranges across grades, not single-decimal-precise dollar values. A coin valuation app that returns '$847.32' for a Mercury dime fails our test immediately; that precision is false and creates liability. An app that shows '$620–$920 for MS-63 condition; $1,200–$1,800 for MS-65' is honest and useful. We also weight transparency about cleaning and damage heavily. An app that silently inflates the value of a cleaned coin without disclosing the grade penalty is unreliable for insurance and tax documentation. We look for explicit language: 'cleaned coins grade one to two points lower' or 'this coin shows signs of light polishing; your actual market value will be 15–25 percent lower.' The apps we recommend are those that help you build a defensible file, not those that maximize the headline number.
Disclosure
We do not accept paid placement or sponsor fees from app developers; our reviews are funded by reader support and are free to publish. We do not recommend an app that returns single-point valuations, even if it claims 'AI accuracy' — we believe a defensible range is worth far more than a false-precise number in contexts where documentation matters. We do not test rare world coins, ancient coins, or numismatic specialties beyond U.S. coinage; our test set reflects what most U.S. homeowners and executors encounter, and we don't claim expertise outside that scope.
Contact
If you are a coin valuation app developer and would like your tool reviewed, or if you think we should test a specific U.S. coin type or denomination, please contact us using the form on this site. We read every request.