BidCap Privacy Policy

Last updated: November 1, 2026 · BidCap was previously called CardBid

BidCap is a price-reference tool for live collectible card auctions. This policy describes what the app does with your data, written to match what the app actually does.

1. Your account

BidCap uses Sign in with Apple. We do not ask for a password, email, phone number or date of birth. Apple gives us an opaque identifier that only works inside BidCap, plus your name if you choose to share it. You also pick a username inside the app. These are stored only on your device.

Only if you turn on cloud card recognition (section 5), the app sends Apple's sign-in token once to BidCap's identification server, which checks it with Apple and returns an access credential for that feature. The server stores only a one-way hash of Apple's identifier and of the credential (never the identifier itself, your name, email or network address). Expired or revoked credentials are deleted after 30 days; signing out revokes the credential and deleting your account deletes them all.

You can sign out or delete your account from Profile. Signing out removes the identifier, name and username from your device; deleting your account also removes the random installation identifier and learned card fingerprints and turns off the optional features in section 5. Your collection and settings stay until you delete the app. To revoke on Apple's side: iOS Settings, your name, Sign-In & Security, Sign in with Apple.

2. Screen reading

To recognize a card while you watch an auction, BidCap uses Apple's screen broadcast extension (ReplayKit). It runs only when you start it, from the app or Control Center, and stops when you stop it. iOS shows the recording indicator the whole time.

Frames are analyzed on your device and discarded. Text and card-art recognition run on the device with a catalog bundled in the app. Frames are not uploaded, except a reduced image of a lot's card (usually one, at most a few per lot) if you turn on the optional AI Maestro (section 5).

What the app keeps on your device from a session: which card it identified, the reference price and limit it computed, and whether you won the lot (your purchase history); up to 20 short fragments of screen text it could not interpret, as a diagnostic; and up to 360 small low-resolution crops (160 pixels wide) of the center of the screen, used to calibrate the detector that tells holo from non-holo cards, continuously overwritten. If you confirm a card with a button, the app also keeps on your device a numeric fingerprint of that card's art (not an image) so it recognizes it next time; you can erase them in Profile. These stored items never leave your device; what is sent during a session is described in sections 4 and 5.

3. Your username on the auction platform

You may enter in Settings the username you use on the auction platform. BidCap uses it for one thing: comparing the on-screen text when a lot closes with your name, to know whether you won. It is stored on your device and never sent. BidCap does not access your account on that platform, does not use its APIs and does not interact with it in any way.

4. What leaves your device by default

5. Optional features (off by default)

Each of these is off until you turn it on in Profile, where it is explained before you enable it. You can turn it off at any time; after that no new data is sent (a request already under way may still complete).

Cloud card recognition

BidCap asks for your permission when you sign in, and you can turn it off at any time in Profile. When it is on, during a live session the app sends a small, straightened crop of the card only (about 320 pixels tall, never the whole screen) over HTTPS to BidCap's own identification server, together with the access credential above, to recognize which card it is. The server compares it with its card catalog and returns the possible matches. Images are not stored; the server's technical log keeps only the lot number, timing, the matched card's identifier and match strength, without images, credentials or network addresses. Prices and your limit are always computed on your device.

AI Maestro (OpenAI)

An assistant that uses OpenAI's API to help identify cards and explain prices. When it is on, BidCap sends over HTTPS to its server, which forwards it to OpenAI for analysis:

Our server keeps only the monthly usage cost, not the images or the questions. OpenAI processes the data under its API terms: it is not used to train its models and may be retained by OpenAI for up to 30 days for abuse monitoring. The AI only suggests: the maximum bid is always computed by BidCap's own rules, and anything the AI identifies is shown as a button for you to confirm.

Help BidCap learn

When a lot closes without an exact identification, BidCap sends over HTTPS to its server the text it read from the card (for example name, HP and number), why it could not identify it, the closing price shown on screen, the date and time, what the art comparator found, internal reading counters, the app build number and a random installation identifier. No images and nothing that identifies you. We use it only to add missing cards and prices to BidCap's catalog. Records are kept for up to 12 months.

6. What stays on your device

Your collection (including CSV imports), purchase history, portfolio value series, cached prices, your limit rules (fees, shipping, margin), learned card fingerprints and the photos you pick from your library to illustrate cards. A thumbnail of each photo is stored in the app's private space; the original is untouched. None of this is uploaded (except as described in section 5, if you turn those features on). Deleting the app deletes it.

7. We do not sell your data

BidCap has no ads, no analytics SDKs, no third-party trackers, and does not use the advertising identifier. We do not sell data and do not share it with anyone beyond the price providers, Apple and, only if you turn on the AI Maestro, OpenAI, as described above.

8. What BidCap does not do

9. Children

BidCap is not directed at children under 13 and we do not knowingly collect information from them.

10. Your choices

11. Changes

If this policy changes, the date above changes with it. Changes that expand what leaves your device will be announced inside the app before they apply.

12. Contact

Questions: cardbidai@gmail.com. BidCap is published by the holder of the Apple developer account shown on the App Store listing.