Kalkudam

Privacy Policy

Last updated: June 2026

Kalkudam (“the app”, “we”) is a calculator suite that runs entirely on your device. We do not collect personal data, we do not track you, we do not run analytics, and we do not embed third-party SDKs. The App Store nutrition label for Kalkudam reads Data Not Collected, and the privacy manifest we ship inside the app (PrivacyInfo.xcprivacy) declares the same posture machine-readably for Apple's review.

What we do NOT do

  • No personal-data collection. Kalkudam does not ask for an account, an email address, a phone number, or any identifier. There is no sign-in screen.
  • No tracking. No cross-app tracking, no IDFA usage, no fingerprinting. The privacy manifest sets NSPrivacyTracking = false.
  • No analytics.No first-party telemetry, no event logging, no crash reporting to anything beyond Apple's opt-in system reporting.
  • No third-party SDKs.The only library Kalkudam ships is Point-Free's Composable Architecture, which is a Swift framework that runs entirely on-device.
  • No networking. The app makes no network calls. Currency and Bitcoin rates come from a bundled, dated table updated with each app release.

What runs on your device

The app does use a small number of Apple system facilities on-device:

  • UserDefaultsstores your in-app preferences — angle mode (RAD/DEG), last-used units, your search/filter state in History. Per Apple's required-reason API rules, this is declared as category NSPrivacyAccessedAPICategoryUserDefaults with reason CA92.1(“read or write app preferences”). Nothing here leaves the device.
  • SwiftDatastores your Universal History (the searchable timeline of calculations you've performed) on disk. Local only.
  • Camera, only while the AR Measure feature is open and you are actively pointing at a surface. The camera feed is processed in memory by ARKit and is never recorded, saved, or transmitted. The reason string Apple displays when prompting for permission is “Used to scan math equations and for AR measurement”.
  • Apple Intelligence (iOS 26+), used by the AI Math Solver. Prompts go to Apple's on-device language model only; nothing is sent to Anthropic, OpenAI, Google, or any other server. We re-evaluate the model's answer with our own deterministic engine before showing it to you.
  • StoreKit handles the Kalkudam Pro subscription. Purchase records live on your Apple ID. We never see your payment information.

Children

Kalkudam is suitable for all ages. Because the app collects no data, no special protections under COPPA, GDPR-K, or analogous regimes are required — there is no data about children (or anyone else) to protect.

International users

The same posture applies everywhere. There is no data transfer because there is no data. EU, UK, Brazil, California, and other privacy regimes treat “no collection” equivalently — Kalkudam has no data subjects to register, no processors to disclose, and no cross-border transfers to declare.

Changes to this policy

If we ever materially change this posture — say, adding an opt-in feature that does require networking — we will update this page and the date above before that feature ships. The privacy manifest inside the app is the machine-readable source of truth and will be updated in lockstep.

Contact

For privacy questions specifically, email privacy@kalkudam.darisadam.online. For general support, see the support page.