Legal · Coin Odyssey

Coin Odyssey Privacy Policy

Effective November 5, 2026

This policy covers Coin Odyssey, an AI coin scanner and collection catalog published by Mosaic Studio LLC (“we,” “us”), an independent software studio based in California, United States. It applies to the iOS and Android apps and to the Coin Odyssey website, which use the same account (together, “the app”). For our studio-wide statement, see the Mosaic Studio Privacy Policy.

Coin Odyssey uses an account so your collection syncs across devices, and it sends the coin photos you scan to an AI service for identification. We use no advertising and no cross-site tracking, and we never sell or rent your personal information. The mobile apps have no analytics. The website counts page views with cookie-free analytics, described below.

Summary

An account is required; your collection and coin photos sync to the cloud.
Photos you scan are sent to our AI provider to identify the coin. They are not used to train AI models.
Your collection is private to your account and is never shown to other users. If you share your want list or export your collection, you choose where it goes.
The website uses only the cookies needed to keep you signed in, and counts page views without cookies.
You can export your collection, and delete your account and its data, from inside the app or on the website.

Information We Collect

Account information. An email address and password. We store your account identifier and email, and whether you signed up on iOS, Android, or the website.
Your collection. The coins you catalog and the details you record — year, denomination, mint mark, grade, country, purchase price and date, and any notes — along with where they sit in your albums, the album spaces you add to your want list, and the badges you earn.
Coin photos. With your permission, the app uses your camera or photo library so you can add photos of your coins; on the website, you can upload photos or, with your permission, use your webcam. Those photos are stored in our cloud storage as part of your collection.
Scan count. How many scans you have used this month, so we can apply the monthly scan limit.
Website usage. When you use the website, our hosting provider, Vercel, keeps standard server logs (such as your IP address, browser type, and the time of each request) for security and reliability. The website also counts page views with Vercel Web Analytics, which sets no cookies and does not follow you across other websites. It records the page, the referring site, and your browser, operating system, device type, and country, and recognizes a returning visit only through a hash that is discarded after 24 hours. We record the page without its query string, and a coin's page is recorded only as “a coin page,” never by which coin it was.
Technical and diagnostic data. Our backend provider records technical data such as your IP address, app version, device type, and request timestamps for security and reliability. The mobile app also sends crash and error diagnostics to Sentry, a crash-reporting service, to help us fix problems. These reports contain technical details (such as error traces, your device model and the app version), a short record of the screens you opened and the buttons you tapped just before the problem, an identifier for the app installation, and your account identifier, but not your name, email, the contents of your collection, or the approximate location Sentry would otherwise derive from the connection, which we have configured it to discard.

We do not collect your precise location, contacts, or advertising identifiers, and the mobile apps contain no ad or analytics SDKs.

How We Use Information

To create and secure your account.
To store your collection and sync it across your devices.
To identify coins from the photos you scan.
To see, in aggregate, which pages of the website are used, so we can improve it.
To count, in aggregate, how many people sign up on iOS, Android, and the website, and how many go on to build a collection, so we can see what helps new collectors get started.
To respond to your support requests.
To maintain, troubleshoot, and secure the app, including diagnosing crashes.

AI Coin Recognition

When you scan a coin, the photo is sent to our AI provider, Anthropic, whose Claude model returns an identification and estimated grade. Under Anthropic's API terms, data sent through its API is not used to train its models. We use the photo only to provide this feature; we do not use it for advertising, and we do not sell it. A copy of the photo is kept in your collection in our cloud storage until you delete it.

When you open the “About this coin” background note, the coin's catalog details (such as its year, denomination, mint mark, and series) are sent to Anthropic to write the note. No photos or account details are sent for this.

Identifications, grade estimates, and background notes are automated and may be wrong. They are informational and are not an appraisal or a valuation you should rely on for a purchase, sale, or insurance decision.

How We Share Information

We do not sell or rent your personal information, and we do not share it for marketing. We use a small number of processors to run the app: our backend and storage provider (Supabase), our AI provider (Anthropic, described above), our crash-reporting provider (Sentry), our website host and analytics provider (Vercel), and the app stores that distribute the mobile apps. When you share your want list or an exported file, it goes only where you send it. We may also disclose information if required by law, or to protect the rights, safety, and security of our users and the service.

Cookies & Tracking

The mobile apps set no cookies. The website sets only the cookies needed to keep you signed in, and remembers your theme choice (System, Light, or Dark) in your browser's local storage. Its page-view analytics set no cookies. Neither the apps nor the website use advertising cookies or track you across other apps or websites. Because we do not track you, we have nothing to change in response to a Do Not Track signal, and we treat Global Privacy Control signals as honored by default.

Data Retention

We keep your account, collection, photos, want list, and badges for as long as your account is active. When you delete a coin, its record and photo are removed; when you delete your account, its data is deleted as described below. Server logs are retained for a limited period and then discarded or aggregated. Website analytics are kept only as aggregate page-view counts.

Your Choices & Deletion

Delete individual coins at any time from within the app.
Export your collection as a spreadsheet (CSV) from the Import and export page, in the app or on the website.
Delete your account, in the app or on the website. Open Profile → Delete account in the app, or Settings → Delete account on the website. This removes your account and the associated collection data.
Access, export, or deletion by email. Write to hello@mosaicstudioapps.com. Emailed deletion requests are honored within 30 days.

Data Security

We use reasonable administrative and technical measures to protect information, including encryption in transit and access controls that scope your content to your account. No method of transmission or storage is completely secure, however, and we cannot guarantee absolute security.

Children's Privacy

Our Services are general-audience products and are not directed to children under 13 (or the equivalent minimum age in your jurisdiction). We do not knowingly collect personal information from children. If you believe a child has provided us personal information, contact us at hello@mosaicstudioapps.com and we will take appropriate steps to delete it.

Your Privacy Rights

Depending on where you live, you may have rights over your personal information. You can exercise many of them directly: edit or delete your content in the app, delete your account (see Your Choices & Deletion), or contact us at hello@mosaicstudioapps.com.

California residents (CCPA/CPRA). If you are a California resident, you have the right to know what personal information we collect and how we use and disclose it; to request access to or deletion of your personal information; to request correction of inaccurate information; and to not be discriminated against for exercising these rights. The categories we may collect are identifiers (such as email and username), your account profile, the content and photos you add, and internet or device activity such as IP address and diagnostic data. We do not sell or share personal information as those terms are defined under the California Consumer Privacy Act (as amended by the CPRA). To make a request, email hello@mosaicstudioapps.com; we will verify your request using the email associated with your account.

California “Shine the Light” & CalOPPA. We do not share personal information with third parties for their own direct-marketing purposes, so there is nothing to request under California's Shine the Light law. Consistent with the California Online Privacy Protection Act, we disclose the categories of information we handle in this policy, describe how you can review, change, and delete your information, note how we respond to Do Not Track signals above, and post the effective date of any changes.

EEA, UK & Switzerland (GDPR/UK GDPR). If you are located in the European Economic Area, the United Kingdom, or Switzerland, Mosaic Studio LLC acts as the data controller for the personal information described in this policy. Our legal bases for processing are: performance of a contract (to provide the App and account you sign up for); our legitimate interests in securing, maintaining, and improving the Services; your consent, where we ask for it (such as camera or photo access); and compliance with legal obligations. You have the right to access, correct, delete, restrict, or object to processing of your personal data, and to data portability, where these rights apply. You may also lodge a complaint with your local supervisory authority. To exercise these rights, email hello@mosaicstudioapps.com.

International Users

We are based in the United States, and the information described here may be processed in the United States and other countries where we or our service providers operate. Where we transfer personal data internationally, we rely on appropriate safeguards as required by applicable law.

Third-Party Links

Our Services may link to or interoperate with third-party sites and services, such as the Apple App Store or Google Play. We are not responsible for the privacy practices of those third parties, and we encourage you to review their policies.

Changes to This Policy

We may update this Privacy Policy from time to time. When we do, we will revise the “Effective” date above. For material changes, we will take reasonable steps to provide additional notice. Your continued use of the Services after an update takes effect constitutes acceptance of the revised policy.

Governing Law

This policy and any dispute relating to it are governed by the laws of the State of California, United States, without regard to its conflict-of-laws principles.

Contact Us

Questions about this policy or our privacy practices? Reach us at hello@mosaicstudioapps.com, or for product support at support@mosaicstudioapps.com.

Mosaic Studio LLC
California, United States