TL;DR: Both are AI-powered coin identifier apps available on iOS and Android. CoinKnow (by SenseWake Limited) leads on U.S.

The 1990 penny error coins represent some of the most exciting finds for modern coin collectors. This year marked a significant transition in U.S. Mint production ...

Wrong planchet errors represent some of the most dramatic minting mistakes possible. Wrong planchet and off-metal errors occur when a correctly made blank from one denomination is accidentaly fed into ...

Make sure you check your rare coin collection as certain pennies can be worth thousands more than face value. So do you own ...

As with just about any asset, a coin's value is determined by its market demand. This means that coins in short supply often see higher demand — and higher values. With coins, supplies are limited ...

Some of the rarest and most valuable coins in U.S. history owe their worth to minting errors that slipped through unnoticed. Coins like the 1943 Copper Penny, struck in copper instead of wartime steel ...

BRITS have been urged to rifle in their pockets and check down the backs of sofas after a “very rare” £1 coin sold for more ...

The Royal Mint manufactures between three million and four million coins a day, so it can be common for things to go wrong and designs to come out a little obscure AN ...

A seller has listed a 2017 Benjamin Bunny 50p featuring Beatrix Potter with a rare rotation error for a staggering £27,674.70.

Brits have been told to look out for a 50p coin that could be worth more than 80 times its face value. This coin, from 2017, has sold in the past for as much as £40 ...