Effective Date: March 25, 2026
Just One ("the App") is a daily focus productivity app developed by Juyeon Yu ("we", "us", or "our"). We respect your privacy and are committed to protecting your personal data. This Privacy Policy explains how we handle information when you use our App.
We do not collect, store, or transmit any personal data to external servers.
All data you create in the App — including your daily tasks, completion records, reflections, and usage history — is stored locally on your device using Apple's SwiftData framework. This data never leaves your device unless you choose to back it up via iCloud (managed by Apple, not by us).
We do not require account creation, login, or any form of registration to use the App.
We do not collect: names, email addresses, phone numbers, location data, device identifiers, usage analytics, crash reports, cookies, or any other form of tracking data.
Apple App Store & StoreKit: If you purchase a subscription, the transaction is processed entirely by Apple. We do not have access to your payment information, credit card details, or Apple ID. Apple's privacy policy governs these transactions.
Apple Push Notification Service (APNs): The App may send local notifications to remind you of your daily tasks. These notifications are scheduled locally on your device and do not involve any external server communication.
We do not integrate any third-party analytics, advertising, or tracking SDKs.
All App data is stored on-device. If you enable iCloud backup on your device, your App data may be included in your iCloud backup, which is governed by Apple's privacy practices. We have no access to your iCloud data.
If you delete the App, all locally stored data will be permanently removed from your device.
The App does not knowingly collect any data from children under the age of 13 (or equivalent minimum age in your jurisdiction). Since we do not collect any personal data from any user, no special provisions are necessary.
We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated effective date. We encourage you to review this page periodically.
If you have any questions about this Privacy Policy, please contact us at:
Email: justone.app.help@gmail.com