Caduca collects nothing

There is no account, no server, and no analytics. Your screenshots and the text read from them stay on your device.

The short version. Caduca reads your screenshots on your iPhone and stores what it finds in a database inside the app, on the device. Nothing is uploaded, nothing is shared, and no one — including us — can see any of it. This is why the App Store privacy label for Caduca reads Data Not Collected.

Who we are

Caduca is an independent iPhone app operated by Rufus Howe. Questions about this policy can be sent to [email protected].

What Caduca does with your screenshots

When you grant photo access, Caduca reads the screenshots already in your photo library. For each one it recognises the text using Apple's Vision framework, classifies it, and stores the recognised text, a category, and a reference to the photo in a database held inside the app's own storage on your device. The screenshots themselves are never copied, moved, or altered — they stay in your photo library where they were.

All of this happens on the device. No screenshot and no recognised text is transmitted anywhere, which is why sorting and search work with the phone in aeroplane mode.

Network activity, stated precisely

Caduca itself makes no network requests. Two things involve the network indirectly, and both are performed by iOS rather than by Caduca:

Screenshots stored in iCloud Photos: If your library is optimised for storage, the original of a screenshot may live in your iCloud account rather than on the phone. When Caduca needs to read one, iOS fetches it from your own iCloud account. Nothing is sent to us or to anyone else; this is your device retrieving your own file.
Subscriptions: Purchases are handled entirely by Apple's App Store. Caduca uses Apple's StoreKit and receives only whether a subscription is currently active. We never see your name, your email address, or your payment details, and there is no third-party payment or analytics service involved. Apple's own privacy policy governs that transaction.

Permissions Caduca asks for

Photos: Read and write access to your photo library. Read, so Caduca can sort your screenshots. Write, so it can delete the ones you choose to clear — every deletion is confirmed by iOS in its own dialogue, and deleted items go to Recently Deleted for thirty days.
Calendar (write only): Requested only when you tap "Add to Calendar" on a screenshot with a detected date. Caduca can create an event you approve; it cannot read your calendar, and it never writes an event on its own.

What Caduca does not do

No account or sign-in. No analytics, telemetry, or crash reporting. No advertising and no advertising identifiers. No third-party SDKs that collect data. No tracking across apps or websites. Nothing is sold or shared, because nothing is collected.

Files you export

When you export a category as a PDF, the document is created on your device and handed to the iOS share sheet. Where it goes next is entirely your choice. If you save it to iCloud Drive or send it to someone, that is your action and your service's policy applies to it.

Children

Caduca is rated 4+ and collects no data from anyone, including children.

Changes

If this policy changes, the revised version will be posted on this page with a new effective date. Because Caduca collects nothing, we do not expect substantive changes.

Effective 9 August 2026.