CoinKnow: Coin Identifier

Name: CoinKnow: Coin Identifier
Availability: InStock
Rating: 4.450980186462402 (122 reviews)
Author: SenseWake Limited

SenseWake Limited

In-app purchases

4.5

122 reviews

5K+

Downloads

Everyone

About this app

CoinKnow is the coin identifier and coin scanner for U.S. coins. Our coin identification technology lets you simply snap a photo to instantly recognize any American coin—from rare pennies to silver dollars.
As a comprehensive coin value checker, CoinKnow provides accurate, real-time coin appraisal based on current market data. Get instant coin value estimates for your entire collection, whether you're evaluating a single coin or cataloging hundreds.

Perfect for coin collectors, dealers, estate sellers, or anyone who's discovered old coins, our coin scanner uses image recognition to identify mint marks, years, varieties, and condition grades. The coin identification process takes just seconds, and our coin value checker instantly delivers coin appraisal results.

Key Features:
- Instant coin identification with photo scanning
- Accurate coin value checker and appraisal tool
- Comprehensive database of U.S. coins
- Collection management and tracking
- Current market values and price trends

Discover the true value of your coins with CoinKnow—your coin identifier and coin appraisal expert.

Updated on

Jan 21, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.

No data shared with third parties

Learn more about how developers declare sharing

No data collected

Learn more about how developers declare collection

Ratings and reviews

4.4

120 reviews

Kristy

January 10, 2026

As much as I tried, the results were all wrong. This app is unreliable unless you have the correct source of lighting for photographing or scanning coins. Also, the server is overloaded and fails during all hours of the day and night. Highly frustrating! Otherwise, this app is unreliable, and I will not invest in it past the free trial.

8 people found this review helpful

SenseWake Limited

January 11, 2026

hi, Kristy, I'm sorry the app hasn't met your expectations. Lighting issues and server problems are incredibly frustrating. We appreciate your feedback and are actively working on improving stability and performance. Thank you for trying the app during your trial period.

Valerie Park

January 8, 2026

I clicked to subscribe to the 7-day free trial, plus $38 per year. After I input my info and payment method, it changed the price to 7-day free trial, plus $38 per month. I emailed customer service several hours ago, but got no reply so far. I don't want to be billed monthly for $38, so I unsubscribed. I enjoyed using it, but it did give me a wrong date several times, and so did their competitor: CoinValueChecker. I'm in a café and the lightning is okay from overhead fluorescents & huge windows

11 people found this review helpful

SenseWake Limited

January 9, 2026

Hi, Valerie, We sincerely apologize for the billing error you experienced. The configuration issue has been fixed, and since you unsubscribed, you won't be charged. Any incorrect charges will be refunded within 24 hours. We're also working to improve date accuracy. I'm also sorry for the date inaccuracies and our delayed response.

Tracy Hicks (Zeppelinmoon)

January 11, 2026

I have never even the free apps are better than this app out of 25 coins that are all graded ms 62 or better very clear coins they got one right I think this app sucks

7 people found this review helpful

SenseWake Limited

January 11, 2026

Hi, Tracy, We understand your frustration. A question: were your coins in protective holders? Plastic cases often cause glare that affects accuracy. Also, our grading provides a range, not exact values—even experts can't give 100% precise grades from photos alone. We're sorry this didn't meet your needs and appreciate your feedback to improve.