Jet Log (iOS / macOS / watchOS, hereinafter “the App”) protects users’ personal information appropriately in accordance with this Privacy Policy.
Last updated: June 28, 2026
The App collects the following information to provide its service.
The App does not collect any browsing history, location data, contacts, advertising identifiers, or other information beyond the above.
We use the collected information only for the following purposes.
The App does not use your data for advertising or marketing purposes.
Except with your consent or as required by law, we do not provide your personal information to third parties.
However, the following services are essential to providing the App’s functionality, and information is processed in accordance with each provider’s terms.
| Service | Provider | Purpose |
|---|---|---|
| Firebase Authentication | Google LLC | User authentication |
| Cloud Firestore | Google LLC | Storing and syncing app data |
| Sign in with Apple | Apple Inc. | Authentication via Apple ID |
Please refer to each company’s official page for their privacy policies.
The App displays no advertising (such as Google AdMob) and provides no information to advertising providers.
The App has no social features (such as following, likes, or public profiles). All data you record — tags, tracking logs, statistics, and so on — is accessible only by your own account and is never made public to other users.
Your email address and account settings are also never made public to other users.
User data is securely stored on Google Firebase (Cloud Firestore). Firebase holds SOC 1/2/3 and ISO 27001/27017/27018 certifications and complies with industry-standard security practices. Each device (iOS / macOS / watchOS) keeps a local cache for offline use.
Data is retained for as long as you hold an account. If you delete your account, the related personal information and recorded content are, in principle, deleted promptly. However, it may temporarily remain in system backups.
You can delete your account at any time from “Settings” → “Delete Account” inside the App, and all data associated with you (tags, tracking logs, display settings, etc.) is completely deleted. Please note that deletion cannot be undone.
The App is available on iOS / macOS / watchOS, and by signing in with the same account, your tags, tracking logs, and settings are automatically synchronized across devices. Synchronization is performed via Cloud Firestore.
The App is not intended for use by children under 13. If we learn that a child under 13 is using the App, we may delete the account.
Data collected by the App may be stored and processed on servers outside Japan through the infrastructure of Google Firebase and Apple. By using the App, you consent to such cross-border data transfers.
This Privacy Policy may be revised in response to changes in laws or the service. For significant changes, we will notify you within the App or by email.
For inquiries regarding this Privacy Policy, please contact us at the email address below.
Effective date: June 28, 2026 Last updated: June 28, 2026