Privacy Policy
Last updated: 2025-10-11
This Privacy Policy (“Policy”) applies to the “Manabii” iOS application and website provided by Aisara (“we,” “our,” or “us”). This Policy explains what information we collect, how we use it, how long we retain it, when it may be shared, how it is protected, and your rights and contact methods.
1. Information We Collect
(A) In the App
- Authentication data: identifiers issued by anonymous sign-in or similar mechanisms (e.g., Firebase Authentication UID)
- User input: learning logs such as English/Japanese balance records, word notes, and dates
- Technical data: device model, OS version, app version, IP address, and crash/error logs
(B) On the Website
- Optional email addresses (for beta invitations or inquiry support)
- UTM parameters for campaign tracking
- Access logs (IP address, user agent, etc.)
- Analytics events (non–personally identifiable; e.g., Plausible Analytics)
2. Purpose of Use
- To provide and maintain the service (authentication, data storage, synchronization, backups)
- To improve functionality and quality (bug investigation, performance measurement)
- To send notifications and important announcements (e.g., outages or specification changes)
- To prevent misuse and ensure security
- To comply with laws and resolve disputes
3. Retention Period
Collected information is retained only as long as necessary to fulfill the purposes described above. When a user requests deletion of their account or data, it will be deleted within a reasonable time unless retention is required by law.
4. Third-Party Sharing and Delegation
We may outsource certain operations necessary for service operation and allow the contractor to handle personal data. Appropriate agreements and supervision are implemented. Except as required by law, we do not sell or share personal information with third parties without user consent.
- Infrastructure: Google Cloud (Cloud Run / Cloud SQL, etc.)
- Authentication: Firebase Authentication (Google LLC)
- Crash analytics: Firebase Crashlytics (Google LLC)
- Web hosting: Vercel
- Web analytics: Plausible (no PII transmitted)
Some service providers are located outside Japan and subject to their local laws.
5. Security Measures
- Encrypted communication (HTTPS/TLS)
- Access control and log management
- Operations based on the principle of least privilege
6. Your Rights
You may request disclosure, correction, addition, deletion, or suspension of use of your personal data. We will respond within a reasonable scope in accordance with applicable laws.
7. Data Deletion and Export
To request deletion or export of your data, please use the following template. For identity verification, we may request minimal information as needed.
Email address:
Subject:
[Manabii] Request for Data Deletion (or Export)
Body (required details):
- Your email address (if registered)
- Device name / iOS version / App version
- Scope (all / specified period / specific records, etc.)
- Other requests
8. Use by Minors
This service is intended for parents and is not designed to collect personal information directly from children.
9. Contact
- Business name: Aisara (JP)
- Email: support@aisara.jp
10. Revisions
This Policy may be updated as necessary. Significant changes will be announced on this page.