Defuse

Privacy Policy

Effective date: 2026-05-04 · Last updated: 2026-05-04

Short version. Defuse stores everything you type on your iPhone. We do not run servers, we do not run analytics, and we do not have a way to see your worries even if we wanted to.

1. Who we are

Defuse is an iOS application published by Zhang Jiahao ("we", "us", "our"). You can reach us at jasperabundant@gmail.com.

2. Information we do not collect

We have engineered Defuse so that the following information never leaves your device and never reaches us:

The app contains no third-party SDKs for analytics, attribution, advertising, crash reporting, or A/B testing.

3. Information stored locally on your device

Defuse writes JSON files to your app's Application Support directory (sandboxed by iOS) and uses UserDefaults for preferences. The contents are visible only to you and to the app itself. They include:

Unsaved drafts older than 7 days are automatically purged at app launch.

4. How Apple may collect data on our behalf

Although we do not collect data, Apple does collect limited operational data when you use the App Store and its services. This is governed by Apple's Privacy Policy, not ours.

5. Notifications

If you enable the daily check-in reminder in Settings, Defuse schedules a local notification through iOS. The notification is generated and delivered entirely on your device. We do not use push notifications and have no notification server.

6. Children

Defuse is not directed to children under 13. We do not knowingly collect any data from anyone of any age, but the content includes deadpan dark humour and is rated 12+ in the App Store accordingly.

7. Sharing

Because we do not collect anything, there is nothing to share. Defuse contains a "share as image" feature that produces a PNG on your device; whether and where you share that PNG is entirely your decision.

8. Your rights

You can exercise the following at any time, with no need to contact us:

If you would like written confirmation that we hold no data about you, write to jasperabundant@gmail.com; we are happy to reply.

9. Required-reason API disclosures

Per Apple's Required Reason API guidance, Defuse uses the following Apple-provided APIs for the listed reasons. None of these APIs are used for tracking.

10. International users

Defuse is hosted entirely on your device. Because we do not collect or transmit personal data, no cross-border data transfer occurs. The hotline links shown in the app are static and do not call any external service when displayed.

11. Changes to this policy

If we materially change this policy we will publish the updated version at this URL, update the "Last updated" date above, and (where required) prompt you on next app launch. Your continued use of Defuse after the change indicates acceptance.

12. Contact