Coin Grading App for iPhone
A free AI coin grader that runs natively in Safari on iPhone — no App Store install required. Get a Sheldon-scale grade with a confidence band in 60 seconds.
How to use it on iPhone. Tap the CTA → upload obverse and reverse photos → read the grade. Add to your home screen via Safari Share → 'Add to Home Screen' for one-tap access — it works as a PWA.
Frequently asked questions
Is there a coin grading app for iPhone?
Yes — CoinGrader AI runs natively in Safari on iPhone as a web app. Open the site, upload two coin photos, and get an AI Sheldon-scale grade in about 60 seconds. No App Store install required.
What's the best coin grading app for iPhone in 2026?
On iPhone, the top free options in 2026 are CoinGrader AI (Safari web app — AI grading, no install), CoinKnow (App Store — Sheldon ±2pt and error detection), CoinSnap (App Store — broad world-coin database), and PCGS CoinFacts (App Store — reference + Photograde).
Can I install CoinGrader AI on my iPhone?
Yes. Open the site in Safari, tap Share → 'Add to Home Screen.' It launches like a native app from your home screen and works offline-capable as a PWA.
How accurate is the iPhone coin grader?
AI grading on iPhone is identical in accuracy to desktop because the model runs server-side. Expect about 2 Sheldon points of accuracy on common U.S. coins — enough to decide whether to pay for PCGS or NGC submission.