Ring True: Detect Silver, Gold

Strike a coin, hear the truth. Ring True estimates the silver content of ANY coin from the sound it makes — no per-coin database required. Real physics, not guesswork: a coin rings at frequencies set by its size and its metal's stiffness. Silver rings lower and dramatically longer than copper-nickel. Enter the coin's diameter and weight (or pick a preset - Morgans, pre-1965 US coinage, Silver Eagles, Maples, world crowns), balance it on a fingertip, tap its edge, and the app captures and analyzes the ring automatically. • Silver percentage estimate from the ring tone • Gold mode for gold–copper coins like Gold Eagles and Krugerrands • Independent density cross-check flags clad, plated, and filled fakes • Ring sustain (Q) analysis - genuine silver rings for seconds • Automatic rejection of knocks, taps, and background noise • Size-class mode for coins you don't have exact specs for • Bonus magnetometer mode: instantly catch ferrous (iron/steel) fakes Everything runs on your phone. No account, no ads. Nothing is sent anywhere unless you choose to send feedback on a result. Results are estimates for hobby use, not a professional assay.