Legal

Privacy Policy

Effective date: May 2, 2026

Overview

derenga is a standalone Apple Watch app that communicates time through haptic pulses. This Privacy Policy explains how derenga handles your information — which, in short, is: it doesn't collect any.

No data collection

derenga does not collect, store, transmit, or share any personal data. The app has no internet connection, no analytics, no crash reporting, and no third-party SDKs. It works entirely on your device.

Local storage

derenga stores two small preferences on your device using Apple's standard UserDefaults mechanism:

• Whether you have completed the training mode
• The build version at the time training was last completed

This data never leaves your device and is not accessible to anyone other than you.

No tracking or advertising

derenga contains no advertising, no tracking identifiers (including IDFA and IDFV), and no behavioral analytics. You are not profiled, segmented, or targeted in any way.

No account required

derenga does not require you to create an account, sign in, or provide any personal information to use the app.

System permissions

derenga does not request access to your location, contacts, microphone, camera, health data, or any other system resource beyond what is needed to deliver haptic feedback on Apple Watch.

Children's privacy

Because derenga collects no data whatsoever, it poses no privacy risk to users of any age, including children.

Website analytics

This website (derenga.app) uses Google Analytics 4 to measure visitor traffic and engagement. This data is collected anonymously and is not linked to any personal identity. The derenga app itself contains no analytics whatsoever.

Changes to this policy

If this policy ever changes, this document will be updated and the Effective Date will reflect the change. The current version is always available at derenga.app/privacy.

Contact

Questions? Reach out at hi@haptora.app.

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