This guide breaks down the best free coin identifier apps for U.S. and international coins, accuracy, error detection, and who each app is really for.

CoinKnow is our top recommended coin identifier that uses AI technology to identify coins through photos and is one of only ...

Modern smartphone technology has revolutionized coin identification and valuation. Whether you’re a seasoned numismatist or ...

Discover rare 1990 penny errors, their values, and how apps like CoinKnow help identify valuable coins instantly.

The 2025 Penny Error market presents a unique opportunity for collectors, as these coins represent potentially the last year ...

The 2003 Nickel Error List contains some of the most sought-after minting mistakes that collectors actively hunt for today. These errors can transform a five-cent coin into a valuable treasure worth ...

Turns out these common minting mistakes from 1979 are worth up to $5,000 - and you might have one sitting in your change jar ...

Explore the most valuable 1970 quarter errors, including overstrikes, doubled dies, off-center strikes, and wrong planchet coins. Learn how to identify each variety and see current value ranges for ...

The “Faceless Bat” error represents the most famous mistake on 2020 American Samoa quarters, where debris or grease between the die and planchet obscured the ...