CoinKnow: Coin Identifier

CoinKnow: Coin Identifier

coin value checker & scanner

1.5K ratings
38 reviews
Free
In-App Purchases

Details

Released
December 8, 2025
Updated
October 10, 2026

Features

CoinKnow: Coin Identifier screenshot #1 for iPhone
CoinKnow: Coin Identifier screenshot #2 for iPhone
CoinKnow: Coin Identifier screenshot #3 for iPhone
CoinKnow: Coin Identifier screenshot #4 for iPhone
CoinKnow: Coin Identifier screenshot #5 for iPhone
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About

Identify and assess the value of your coins with advanced scanning technology. Get instant market value estimates, grading recommendations, and detailed error analysis from a single photo. Manage your collection and discover hidden treasures.

✓Accurate coin scanning
✓Copper designation detection
✓Proof finish recognition
✓Rare variety recognition
✓Instant value assessment
✓Collection management tools
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+1

What's New in CoinKnow

2.0.1

October 10, 2026

We’ve refreshed the coin details page for a cleaner, easier browsing experience.

2

Subscriptions & In-App Purchases

Premium Annual

Annual paid premium plan for unlimited access Coinknow

$38.991 Year
7 Days trial
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User reviews

This is a penny worth over 1000$

You rated it at 22$

I want to report shenanigans Officer O’Brady

The app did not catch an obvious chip error and also the fact there’s no reading on the side of this coin. I don’t suggest it. I’m canceling after 10 minutes.

Response from developer

Hi, fuzzyoldman. Thanks for taking the time to flag this — a missed chip and no read on the edge aren't the experience we want you to have, and that's on us to sort out. A few things tend to help the app read coins most reliably: a plain white or black background in bright, natural light, holding your phone about 15–20 cm above the coin so it fills the frame, and capturing both the obverse and reverse (a couple of shots per side never hurts if the first looks off). Edge details and subtle errors can be genuinely tough to catch from a single scan, so if it still misses after that, please send us the coin's name along with clear photos and our team will take a personal look and get you a proper answer. We appreciate your patience.

Consistently misidentiifies

Consistently misidentifies coin values.

Wrong

Wrong

High grading and valuation issues

Such a great concept, but improvements are needed. In general, I found grading is too high. Lighting plays such a key role. I’ve tried emailing support but never get a response at least yet. The valuation does not seem to be consistent between grades for the same coin. Lighting is not a factor on this particular issue. For example, a 1944S Lincoln penny is valued at $17 in VG (8) condition and $1 in F(12) condition. Another example would be a 1955-D Lincoln penny in VF condition you value at $330 when it’s really only worth about $0.25. I wonder how many high valuations I have wrong because I didn’t double check the value generated by your app against an AI tool. Additionally, if you scan a US two cent and three cent piece, in both cases, it returns with no space between two cent and three cent names. So it can’t find the coin. If you manually add a space (twocents vs two cents), it finds the coin category, but you’ve lost the photo and all the relevant details from the prior scan. Finally, you really need to add search criteria and filter criteria to the collection you allow people to build. There is no easy or good way to find a specific coin without manually going through each coin you have scanned into the collection. That frankly is not usable.
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Response from developer

Thank you for your detailed feedback, Owl60J. The valuation inconsistencies you identified, such as the 1944-S and 1955-D Lincoln pennies, are valid concerns that have been escalated to our data team for review. We also apologize for the delayed support response — that is not the experience we want to deliver, and we're working to improve our response times. The spacing issue with two cent and three cent coins, as well as your request for collection search and filter functionality, have both been shared with our development team. Your input is incredibly valuable in helping us improve. Please reach out to our support team again, and we will ensure your case is prioritized.

Developer apps

FAQ

What does CoinKnow do?

CoinKnow is a mobile application that uses advanced scanning technology to identify coins and assess their value. It provides accurate grading precision, market value estimates, and detailed analysis of coin specifications and potential errors.

What are the key features of CoinKnow?

Key features include accurate coin scanning with grading precision, detection of copper conditions and proof finishes, recognition of rare varieties, and automatic error detection. It also offers instant value assessment from a single photo, full coin specifications, and collection management tools.

Is CoinKnow free to use?

The app offers a free daily scan allowance for users. Additional features and advanced capabilities may require in-app purchases, as indicated by the app's monetization model.

Who is CoinKnow for?

This app is designed for coin collectors, hobbyists, and anyone interested in identifying and determining the value of coins. It's useful for examining inherited coins, purchased collections, or even pocket change to discover potential treasures.

How accurate is the coin identification?

The app provides grading precision within a 2-point range on the Sheldon Scale (1-70), ensuring reliable coin value assessments. Advanced algorithms are employed for accurate coin identification and professional evaluation results.