Effective Date: March 31, 2026
Grosbeak Inc. ("we," "us," or "our") operates the Amestella fortune-telling entertainment application ("the App"). This Privacy Policy explains how we collect, use, disclose, and safeguard your personal information when you use the App. Please read this policy carefully. By using the App, you consent to the practices described herein.
| Item | Details |
|---|---|
| Company Name | Grosbeak Inc. (Grosbeak Kabushiki Kaisha) |
| Representative | Tomonori Hamada |
| Address | 8-2-6 Okidome, Ikaruga-cho, Ikoma-gun, Nara 636-0123, Japan |
| info@grosbeak.co.jp | |
| Phone | +81-50-1740-8687 |
| Data Item | Required/Optional | Purpose |
|---|---|---|
| Email address | Required | Account authentication, important notifications |
| Display name | Required | In-app user display |
| Profile photo | Optional | In-app user display |
| Phone number | Optional | Account authentication (phone sign-in) |
| Data Item | Required/Optional | Purpose |
|---|---|---|
| Date of birth | Required | Fortune calculations across multiple divination systems |
| Time of birth | Optional | Precise astrological calculations |
| Place of birth | Optional | Astrological house calculations |
| Latitude/Longitude | Optional | Celestial position calculations (auto-derived from birthplace) |
| Gender | Optional | Used in certain divination systems |
| Data Item | Required/Optional | Purpose |
|---|---|---|
| Pet name | Required | Pet fortune features |
| Pet type | Required | Pet fortune features |
| Breed | Optional | Pet fortune features |
| Pet date of birth | Required | Pet fortune calculations |
| Pet gender | Optional | Pet fortune features |
| Pet photo | Optional | In-app pet display |
| Pet birthplace | Optional | Pet fortune calculations |
| Data Item | Purpose |
|---|---|
| Subscription status | Billing management, service delivery |
| Pentacle balance | In-app currency management |
| Transaction history | Purchase and usage record keeping |
| Fortune results | Saving and displaying fortune history |
| Compatibility history | Saving and displaying compatibility results |
| FCM token | Push notification delivery |
We use the information we collect for the following purposes:
We share information with the following third-party service providers to the extent necessary for providing our services:
| Service | Data Shared | Purpose |
|---|---|---|
| Firebase Authentication | Email, display name, profile photo | User authentication |
| Cloud Firestore | User data, fortune results, pet data | Data storage and management |
| Firebase Cloud Storage | Profile photos, pet photos | Image file storage |
| Firebase Cloud Messaging | FCM token | Push notification delivery |
| Firebase App Check | Device information | Fraud prevention |
| Firebase Cloud Functions | Fortune calculation data | Server-side processing |
Google Privacy Policy: https://policies.google.com/privacy
| Data Shared | Purpose |
|---|---|
| Date of birth, time of birth, gender (anonymized) | AI-generated fortune interpretations |
| Pet information (type, breed, date of birth) | AI-generated pet fortune interpretations |
Data is sent to Google Gemini AI API through Cloud Functions (server-side) only. Your name, email address, and other directly identifying information are not transmitted to the AI service.
Google AI Privacy Notice: https://ai.google.dev/terms
| Data Shared | Purpose |
|---|---|
| User ID (anonymous identifier) | Subscription and purchase management |
| Purchase information | Purchase verification and management |
RevenueCat Privacy Policy: https://www.revenuecat.com/privacy
| Data Shared | Purpose |
|---|---|
| Place of birth (location name) | Geocoding (converting place names to coordinates) |
| Provider | Data Shared | Purpose |
|---|---|---|
| Google Sign-In (Google LLC) | Authentication tokens | Account authentication |
| Sign in with Apple (Apple Inc.) | Authentication tokens | Account authentication |
We do not sell, rent, or trade your personal information to third parties for their marketing purposes. Under the California Consumer Privacy Act (CCPA), we confirm that we have not sold personal information of consumers in the preceding 12 months.
Your personal information is stored on Google Cloud Platform (Firebase) servers, primarily in the Tokyo region (asia-northeast1), Japan.
| Data Type | Retention Period |
|---|---|
| Account information | Until account deletion |
| Fortune results and compatibility history | Until account deletion |
| Pet information | Until account deletion |
| Transaction history | Until account deletion, or as required by law (up to 5 years) |
| Push notification tokens | Until account deletion |
If you are located outside Japan, please be aware that your information will be transferred to and processed in Japan. By using the App, you consent to this transfer. We ensure that appropriate safeguards are in place to protect your data in compliance with applicable data protection laws.
If you are located in Japan, you have the right to:
If you are located in the European Economic Area (EEA), you have the following additional rights:
To exercise these rights, please contact us at info@grosbeak.co.jp.
If you are a California resident, you have the following rights:
To submit a CCPA request, please contact us at info@grosbeak.co.jp.
The web version of the App uses cookies and local storage provided by Firebase for maintaining user authentication sessions.
The iOS and Android versions of the App do not use cookies. However, Firebase SDK may use device identifiers for functionality purposes.
The App does not currently use Google Analytics or other analytics tools. If we implement analytics in the future, this policy will be updated accordingly.
We implement the following security measures to protect your personal information:
While we strive to protect your personal information, no method of transmission over the Internet or electronic storage is 100% secure. We cannot guarantee absolute security.
If you are in the EEA, our legal basis for collecting and using your personal information depends on the data concerned and the context in which we collect it:
| Legal Basis | Applicable Processing |
|---|---|
| Consent | Collection of birth data for fortune calculations; push notifications |
| Contract Performance | Account management; subscription services; in-app purchases |
| Legitimate Interests | Service improvement; fraud prevention; security |
| Legal Obligation | Tax and financial record keeping; responding to legal requests |
If you have questions or concerns about this Privacy Policy or our data practices, please contact us at:
| Item | Details |
|---|---|
| Company Name | Grosbeak Inc. |
| Data Protection Contact | Tomonori Hamada |
| info@grosbeak.co.jp | |
| Phone | +81-50-1740-8687 |
| Business Hours | Monday - Friday, 10:00 - 17:00 JST (excluding holidays) |
Effective: March 31, 2026
Grosbeak Inc.
Representative Director: Tomonori Hamada