Debug a coin
Record 10 pings and send us the numbers
Sure your coin is genuine but it won't match? Record ten clean pings of it below and send us the exact frequencies — we'll dig into why it's off and improve the reference. Audio never leaves your device; only the numbers you see are sent to us. See our privacy policy.
Captured pings
Sends only the numbers above to us — never audio. Offline? It falls back to email.
For the cleanest reading: hold the coin at its edge in a coin ping-test holder so it can ring freely — a fingertip is a last resort. Strike the edge with a striker (not a fingernail) close to the microphone, and let it ring out. A run of 10 consistent taps helps us the most.