Rinmath — Privacy Policy

Last updated: 2026-05-08

Plain-language summary

Rinmath collects nothing. Everything you do stays on your iPhone or iPad. There are no servers, no accounts, no logins. We don’t talk to advertisers or analytics services. The app is paid up-front; there is no in-app purchase, no subscription, and no ads.

What’s stored on your device

Today’s puzzle state (which rings you’ve rotated, your move count, elapsed time, current streak, onboarding flag, color-assist preference, sound preference, preferred operation) — saved as a small JSON blob in your device’s UserDefaults under the key rinmath.snapshot.v1.
Lifetime solve log (date, difficulty, target, par, moves, time for each completed daily) — saved under rinmath.history.v1. Used to draw your History calendar and compute the Stats dashboard. Capped at 1,024 records.
Widget rollup — a separate small JSON blob (today’s target, difficulty, current streak, solved/in-progress flag) is written into the app’s App Group container so the home-screen widget can render without launching the app. The App Group identifier is group.com.rizkcorsight.rinmath. This data also stays on your device — App Groups are an Apple sandboxing mechanism for sharing data between an app and its extensions, not a network channel.

What’s NOT collected

No name. No email. No phone number. No location. No birthdate.
No camera, microphone, photo library, or contacts access.
No advertising identifiers (IDFA, IDFV).
No analytics events. No telemetry of any kind.
No crash reports sent to us. (iOS may send anonymized crash data to Apple if your device’s Diagnostics setting opts in — that’s between you and Apple.)
No third-party SDKs are linked into the app at all.

Network usage

Rinmath is fully offline by design. The app makes no network requests. No data ever leaves your device.

When you tap the Share button after solving, Rinmath generates a small text “share grid” (eight emoji circles plus your stats — looks like 🟢⚪️🟢🟢⚪️🟢🟢🟢) and hands it to the iOS Share Sheet. What happens next is entirely your choice — you decide whether to copy it, send it in Messages, drop it in a group chat, post it on social media, or cancel out. Rinmath itself never transmits the share text anywhere.

Required-reason API declarations

Per Apple’s Privacy Manifest, Rinmath declares the following required-reason API:

UserDefaults — to save your progress, history, and preferences (Reason: CA92.1, “to access user defaults to read or write information that is only accessible to the app itself”).

Rinmath does not use FileTimestamp, DiskSpace, or SystemBootTime APIs.

Audience

Rinmath is rated for general audiences. It is not in the Kids Category on the App Store; if you have purchased the app for a child via Family Sharing, the same privacy posture applies — no information is collected from any user regardless of age.

Changes to this policy

If we ever change the policy, the “Last updated” date at the top will change, and the change will be summarized in the App Store release notes for the build that introduces it.

Contact

Email: rizkcorsight@rizkcorsight.com