Pingcoin

Pingcoin

In-app purchases

About this app

Pingcoin is the digital version of the classical "ping test" for catching counterfeit coins. By recording and analyzing the sound produced by your coins the app is able to tell you if the coin is genuine or fake.

If you've ever found yourself not quite 100% sure about a coin's authenticity, try the ping test with the Ping Coin app. It will prevent you from getting fooled by counterfeit coins and it you will have peace of mind purchasing from even the shadiest coin sellers at fairs and garage sales.


How it works

A coin, like a musical instrument, produces a characteristic sound. Like a musical instrument this sound depends on its shape and on the material it's made out of. A wooden flute sounds different compared to a copper one. Similarly two coins of the same size and weight will sound differently based on the material they're made of.

The app will compare the characteristic sound of your coin (usually comprised of three frequencies) to my reference values. For each coin and for each frequency a tolerance threshold is displayed. If your coin's frequencies fall within the thresholds, it will almost certainly be genuine!

Important notes:

- The ping test works best as a complementary test to other tests. Do not rely solely on the ping test. Instead, combine it with a visual inspection and (ideally) weight and diameter measurements.
- Some coins of different composition, due to the variability in the coins' minting process and their natural wear, have practically indistinguishable sounds. A gold 1 oz Kangaroo and a silver 1 oz Kookaburra, for instance, will have practically indistinguishable resonance frequencies. Please note that this means that a test intended for one coin will work on the other and vice versa. This is why you cannot rely solely on the ping test.

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How to ping your coin

https://youtu.be/b4LbRGKTNiE

Pinch the coin at its center keeping the surface area of your fingers to a minimum. (Imagine that the coin vibrates at the sides but stays fixed at its center.) Then flick the coin with a finger from your other hand. This can be done very softly. Don't worry if the sound is shorted and muffled, your smartphone mic will pick it up anyway.

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Coins currently supported

- Gold South-African Krugerrand (1 oz)
- Gold American Eagle (1 oz)
- Gold Austrian Corona (100)
- Gold Canadian Maple Leaf (1 oz)
- Gold Great Britain Britania (1 oz)
- Gold Australian Kangaroo (1 oz)
- Gold Chinese Panda (1 oz)
- Gold Iranian Bahar Azadi
- Gold APMEX Round (1/4 oz)
- Silver Australian Koala (1 oz)
- Silver Britannia (1 oz)
- Silver American Buffalo (1 oz)
- Silver American Peace Dollar [alpha]
- Silver American Morgan Dollar [alpha]
- Silver Cook Islands Bounty (1 oz)
- Silver American Eagle (1 oz)
- Silver Somalian Elephant (1 oz)
- Silver Australian Kookaburra (1 oz)
- Silver Canadian Maple Leaf (1 oz)
- Silver Chinese Panda (1 oz)
- Silver Austrian Philharmonic (1 oz)
- Silver Australian Lunar Rooster (1 oz)
- Silver Tuvalo (1 oz)
- Silver Swedish 5 Kronor [alpha]
- Silver Franklin Half Dollar
- Silver Walking Liberty Half Dollar
- Silver Mexican Libertad
- Silver Morgan Dollar
- Silver Peace Dollar

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Submit new coins

Use the "Submit a coin" feature inside the app to submit a recording for a new coin to be added. Once the ping has been analyzed, the coin will appear in the list.

Any other feedback (send an email via the app) is GREATLY appreciated.

Ratings and reviews

used to be free and accurate. now, can't authenticate any legitimate coin, forcing you to pay to upgrade for accurate results. used to rely on it, now just terrible AND they want you to pay for it Edit: nice canned response, developer. doesnt change the fact that the app won't accurately detect unless you pay (which is actually zero free pings), and it may be a small price to pay, but why should I pay it to you? Edit: except it isn't improving and you're asking too much.

Adequate for what few coins are available in it however the lack of huge amounts of older silver coins being counterfeited in China limit it's usefulness. I personally would need to be able to test UK sterling & 50 % silver Crown, Half Crown, Double Florin, Florin, Shillings, 6 pence & 3 pence before it would be worth upgrading the app. Canadian and European (French, German, Netherlands, etc) silver coins as well.

once you get a good technique for pinging your coin (I balance the coin on the back of a tablespoon and tap the rim very lightly with something metal, in my case a pen), the app is fast and accurate. very light ping needed, so it's easy to get results. reliably determined my legit silver buffalo, and also rejected fakes.

What’s new

Added support for Kennedy Half Dollar 1965-1970