Free Coin Grading App for Android
Open Chrome on your Android phone, drop in a coin photo, and an AI grader returns a Sheldon-scale grade in about 60 seconds. No Play Store install, no account.
How to use it on Android. Tap the CTA below in Chrome → take a clear photo of the obverse and reverse → drop the photos into the grader → read the grade and confidence score. Add the page to your home screen ("Install app") for a one-tap launch — it runs offline-capable as a PWA.
Frequently asked questions
Is there a free coin grading app for Android?
Yes — CoinGrader AI runs as a free web app in Chrome or any Android browser. Open the site, upload a photo, and get a Sheldon-scale grade in about 60 seconds. No Play Store install required, no account needed for the free tier.
What's the best coin grading app for Android in 2026?
Top free options on Android in 2026 are: CoinGrader AI (web-based, AI grading, no install), CoinKnow (Play Store, Sheldon ±2pt + error detection), CoinSnap (Play Store, broadest world-coin database), and PCGS CoinFacts (Play Store, reference + Photograde).
Do I need to install an Android app to grade a coin?
No. CoinGrader AI is a web app — it works in any Android browser without an install. If you'd rather grade from a native app, CoinKnow and CoinSnap are the most-used Android installs in 2026.
Is the Android coin grader accurate?
AI grading on Android is just as accurate as on desktop, because the model runs server-side. Expect roughly 2 Sheldon points of accuracy on common U.S. types — enough to make a confident decision about whether to submit to PCGS or NGC.