Privacy Policy
Last updated: 11 August 2026
Holomark(“we”, “us”) makes a mobile app for cataloguing Pokémon trading cards, tracking their market value, and listing them for sale on eBay. This policy explains what we collect, why we collect it, who we share it with, and how you can get it deleted.
We do not sell your personal information, and we do not use it for advertising.
Information we collect
Account information
When you create an account we collect your email address and a username. Passwords are handled by our authentication provider and stored only as salted hashes — we never see or store your password in readable form. If you sign in with Google, we receive your email address and basic profile information from Google instead of a password.
Your collection data
Everything you add to the app: cards and sealed products, quantities, conditions, variants, grading details, your own notes, purchase prices, and any buy/sell/trade transactions you log. This is the substance of the product and is stored against your account.
Photos and camera
The app uses your camera to identify cards. When you scan a card, the captured image is sent to our card-data provider for identification and is used only to return a match. You may also attach your own photos to graded cards or eBay listings, which are stored with your collection. We do not access your photo library except for images you explicitly choose.
eBay account information
If — and only if — you connect an eBay account, we store the access and refresh tokens eBay issues us, your eBay user ID, and the listings and orders created through Holomark. We use these solely to create, update, and track the listings you ask us to make. We never receive your eBay password. You can disconnect at any time in the app, which revokes our access.
Subscription information
Purchases are processed by Google Play (and, in future, the Apple App Store) and managed through our subscription provider. We receive your subscription status and an anonymous purchase identifier. We never receive or store your payment card details.
Diagnostics
We collect crash reports and error diagnostics to find and fix bugs. These can include device model, operating system version, and the state of the app when it failed.
How we use it
- To provide the app: storing your collection and syncing it across your devices.
- To identify cards you scan and show their market prices and history.
- To create and manage the eBay listings you choose to make.
- To determine whether you have an active PRO subscription.
- To produce anonymous, aggregated statistics — for example “owned by 29% of collectors”. These are computed across all users and never identify anyone.
- To diagnose crashes and improve reliability.
- To contact you about your account or a material change to the service.
Who we share it with
We share data only with the service providers needed to run the app, and only for the purpose described:
| Provider | Purpose |
|---|---|
| Supabase | Database, authentication, and file storage |
| Scrydex | Card catalogue, pricing, and scan identification |
| RevenueCat | Subscription management |
| Google Play | Payment processing |
| eBay | Listing and order management (only if you connect it) |
| Sentry | Crash and error reporting |
| Railway | Backend hosting |
We may also disclose information if required by law, or to protect our rights, safety, or property. If Holomark is ever acquired, your data may transfer to the acquirer, who would remain bound by this policy.
Data retention
We keep your data for as long as your account exists. When you delete your account, your personal data and collection are removed from our active systems promptly, and from routine backups within 30 days. Anonymous aggregated statistics that cannot identify you may be retained.
Your rights and choices
You can, at any time:
- Delete your account and all associated data from within the app (Profile → Account → Delete Account), or by using our account deletion page if you no longer have the app installed.
- Access or correct your information — most of it is editable directly in the app; for anything else, email us.
- Request a copy of your data by emailing us.
- Disconnect eBay in the app, which revokes our access to your eBay account.
- Withdraw camera permission in your device settings. Scanning stops working; the rest of the app does not.
Depending on where you live, you may have additional rights under laws such as the GDPR or CCPA — including the right to object to processing or to lodge a complaint with your local data protection authority. We honour these requests regardless of where you are.
Security
All data is encrypted in transit using HTTPS/TLS and encrypted at rest by our hosting providers. Access to production systems is restricted. No system is perfectly secure, but we take reasonable measures appropriate to the sensitivity of the data — which is, primarily, a list of trading cards.
Children
Holomark is not directed at children under 13, and we do not knowingly collect personal information from them. If you believe a child has provided us information, email us and we will delete it.
International transfers
Our providers may process and store data in the United States and other countries. By using Holomark you consent to this transfer.
Changes to this policy
We may update this policy as the app changes. We will revise the “last updated” date above, and for material changes we will notify you in the app or by email.
Contact
Questions, requests, or complaints: holomarkapp@gmail.com.
Holomark is not affiliated with, endorsed by, or sponsored by Nintendo, The Pokémon Company, or eBay.