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Privacy Policy — Black Dossier

Last updated: August 2026

Black Dossier ("the app") is developed by Duskwing Studios ("we," "us," "our"). This policy explains what data the app collects, how it's used, and — just as importantly — what stays entirely on your device.

The short version

Everything you personally enter into Black Dossier — your entries, notes, scores, photos, and Health Log data — is encrypted and stored locally on your device only. We never see it, never receive it, and cannot access it. There is no account, no cloud sync, and no server storing your content.

The only data that leaves your device is limited technical information required for advertising (via Google AdMob) and processing purchases (via Apple's App Store), described below.

Data stored only on your device (never collected by us)

• Your entries, notes, scores, and tags about people you've logged
• Your Passport bio, name, age, gender, sexual orientation, and profile photo
• Your travel/stamp history
• All Health Log data — conditions, dates, and calculated exposure windows. This data is never shared, transmitted, or included in any exported or shareable content under any circumstance, except if you personally choose to export it in a future version of the app.
• Your PIN(s) — stored only as an encrypted derivation, never in plain form, never transmitted anywhere

This data is protected by encryption derived from your PIN. We have no ability to access, recover, or reset it — if you forget your PIN, your data cannot be recovered by us or anyone else.

Data collected by third-party services we use

Advertising (Google AdMob)
Black Dossier shows ads to free-tier users via Google AdMob. AdMob may collect:

• Device and advertising identifiers
• General usage/interaction data related to ad display
• Approximate, non-precise location data (used for general ad relevance, not derived from GPS)

If you grant permission via the App Tracking Transparency prompt, this data may be used to show more relevant ads. If you decline, you'll still see ads, but they won't be personalized. This data is governed by Google's Privacy Policy.

Purchases (Apple App Store)
If you purchase "Remove Ads" (one-time or subscription), Apple processes the transaction directly. We receive confirmation that a valid purchase was made, but no payment card or billing details ever pass through us — that's handled entirely by Apple.

What we don't do

• We don't have servers that store your personal content
• We don't sell your data
• We don't share your data with anyone beyond the third-party services described above, which are necessary to operate ads and purchases
• We don't require an account, email, or any sign-in to use the app

Your choices

• You can decline App Tracking Transparency at any time; the app remains fully functional
• You can remove ads entirely via an in-app purchase, which also stops all ad-related data collection going forward
• Since there's no account, there's no data for us to delete on request — your data lives only on your device, under your control. Deleting the app deletes it.

Children

Black Dossier is rated 18+ and is not intended for use by anyone under that age.

Changes to this policy

If this policy changes, we'll update the "Last updated" date above. Continued use of the app after changes constitutes acceptance of the updated policy.

Contact

Questions about this policy or the app can be sent to: support@duskwingstudios.com