CoinPing –

The Pocket Pinger + Stack Stick, Coin Ping Test (Black, 1 Pack)

Precious Coin Tester - Apps on Google Play

Klangtest Pocket Pinger - Der Coin Ping Test

Ping Test for Silver Coins & Bars

Coin Ping Test for Gold and Silver Coins

Precious Coin Tester by AUGer kit

Still the best app. Always use multiple testing methods. # # # If you or someone you know would like to test metals with a Pocket Pinger, they're, By Sound Money Metals

Jual Coin Ping Test. - Kota Tegal - Asa Evlogia

The Pocket Pinger: companion tool for Precious Coin Tester

THE POCKET PINGER w/ Stack Stick - Coin Ping Test £33.12 - PicClick UK