Privacy Policy

1. Introduction

Miku is an app developed by PraserGames LLC, a New Jersey limited liability company, United States. This policy describes what data Miku collects, how it is used, and your rights regarding that data.

2. Data We Collect

Pet data, app settings, and the local copy of your chat history are kept in encrypted local storage on your device. Generating an AI reply requires sending your messages to our AI provider; that flow and other features that transmit data to third parties are described below.

• Local device storage — pet state, settings, personality data, and the on-device copy of your chat history are stored in encrypted local storage on your device. The local copy is the only copy PraserGames LLC keeps; we do not maintain server-side chat history. Each message is also transmitted to our AI provider at the moment of sending — see “AI chat inference” below.
• AI chat inference — when you use the AI chat feature, data including pet context and conversation content is transmitted to our AI model provider(s) to generate a response. Currently we use Google's AI models via Firebase AI Logic. PraserGames LLC does not independently store message content on its servers; data handling by AI providers is governed by their own terms and privacy policies. See Google's Privacy Policy. Legal basis: Art. 6(1)(b) GDPR (contract).
• Authentication — by default, Miku uses anonymous device-based authentication. No email address, phone number, or password is collected for anonymous accounts. You may optionally link your account to a social identity provider (such as Google or Apple) or email. When you do, we receive information provided by that service — such as your name, email address, and profile photo — which is stored in our authentication system. Legal basis: Art. 6(1)(b) GDPR (contract).
• Community features — if you choose to participate in community features (such as the leaderboard), the information you submit is stored on our servers and is publicly visible to other users. Community participation is optional. Community data associated with your account is removed or anonymized when you delete your account (see Section 5). Legal basis: Art. 6(1)(a) GDPR (consent).
• Service-limit usage counters — we store usage counters on our servers associated with your account identifier. This data is linked to your account identifier and is used for capacity management, abuse prevention, and related operational purposes. Legal basis: Art. 6(1)(f) GDPR (legitimate interest in preventing abuse).
• In-app feedback — if you submit feedback through the app, your feedback and account identifier are stored on our servers. Feedback submissions are visible to all authenticated users via the community feedback board. If you vote or comment on feedback items, your identifier and any text you provide are stored and visible to other users. Legal basis: Art. 6(1)(a) GDPR (consent).
• Analytics events — we collect usage events such as app opens and feature interactions via our analytics provider. Analytics events are associated only with anonymous or pseudonymous identifiers and are not linked to your name, email address, or other directly identifying information. Legal basis: Art. 6(1)(f) GDPR (legitimate interest). You can disable analytics at any time in the app's privacy settings.
• Crash reports and diagnostics — our crash reporting service captures diagnostic data. Diagnostic reports may include device information, app state at the time of a crash, and your anonymous account identifier. Crash reporting is not individually configurable in settings. Legal basis: Art. 6(1)(f) GDPR (legitimate interest in maintaining a stable and reliable application). You may object to crash data being associated with your identifier at any time by contacting us (see Section 9).
• In-app purchases — if you subscribe to Miku Premium, payments are processed by Apple (App Store) or Google (Google Play). We receive confirmation of your purchase status from these providers and store your subscription tier on our servers associated with your account identifier. We do not store your payment details. Legal basis: Art. 6(1)(b) GDPR (contract). See Apple's Privacy Policy and Google's Privacy Policy.
• App integrity verification — on each app launch, we use platform-provided device attestation services (such as Play Integrity on Android and App Attest on iOS) to verify that requests originate from a genuine installation of the app. Attestation data is processed by the platform provider. No personal data beyond what is described elsewhere in this policy is processed by PraserGames through this process. Legal basis: Art. 6(1)(f) GDPR (legitimate interest in security).
• Remote configuration — on each app launch, the app fetches configuration parameters from our servers. The request includes an anonymous installation identifier but no personal data. Legal basis: Art. 6(1)(f) GDPR (legitimate interest in delivering correct app configuration).

Where data is transferred to providers outside your country (for example, to US-based providers), those transfers are made under appropriate safeguards including Standard Contractual Clauses and Data Processing Agreements, as required by applicable law.

3. How We Use Your Data

We use data as described in this policy for the following purposes, which may evolve as the app's features change:

• To provide app functionality.
• To generate AI chat responses via our AI model provider(s).
• To analyze anonymous usage patterns.
• To diagnose crashes and errors.
• To enforce rate limits and verify subscription status.
• To operate, secure, and improve PraserGames products and services.

4. Third-Party Services

Miku uses third-party service providers to operate. We may change providers within a category over time; switching providers within an existing category is not a material change to this policy. We will update this section to reflect current providers.

• Authentication & cloud services (currently Google Firebase) — provides anonymous authentication, cloud database, App Check, Remote Config, and purchase verification. See Google's Privacy Policy.
• AI inference (currently Google via Firebase AI Logic) — generates chat responses from conversation context. See Google's Privacy Policy.
• Analytics (currently Firebase Analytics) — collects anonymous usage events. See Google's Privacy Policy.
• Crash reporting (currently Sentry) — captures crash reports and diagnostic data. See Sentry's Privacy Policy.
• Payment processing — Apple App Store and Google Play process subscription payments. See Apple's Privacy Policy and Google's Privacy Policy.

5. Data Retention & Deletion

Local data (pet state, settings) is stored on your device and is deleted when you uninstall the app. Server-side data (community data, feedback, usage counters, subscription tier, and — if you used social sign-in — your name, email address, and profile photo) is associated with your account identifier and is retained while your account exists.

• Crash report logs — retained according to our crash reporting provider's standard schedule (currently 90 days), then deleted.
• Analytics data — retained according to our analytics provider's standard schedule (currently up to 14 months).
• Server-side data — retained while your account exists; deleted upon account deletion.
• Local data deletion — to clear all local data without deleting your account, sign out from the app's account settings.
• Full account & server-side deletion — to delete your account and associated server-side data, use the account deletion option in the app's settings (Settings → Danger Zone → Delete All Data). This removes local data, deletes your community entries and usage counters, and deletes your authentication account. Any feedback or comments you submitted are anonymized (content is preserved; your identifying information is replaced with an anonymous placeholder). Deletion requests are processed promptly and may not be reversible. For step-by-step instructions and a full list of what is deleted, see our account deletion page. If you need assistance, contact support@prasergames.com.
• Data export — you may request a copy of your server-side data. Chat messages are transmitted to our AI provider when you send them but PraserGames does not retain server-side chat history; the encrypted on-device record is the only copy we keep. Because we do not hold a server-side copy, conversation content is not included in server-side exports. You can read your conversations directly in the app at any time from the chat screen.

6. Breach Notification

In the event of a personal data breach that is likely to result in a risk to your rights and freedoms, we will notify the relevant supervisory authority within 72 hours of becoming aware of the breach, in accordance with GDPR Art. 33. If the breach is likely to result in a high risk to you, we will also notify affected users directly, in accordance with GDPR Art. 34. We also comply with applicable US state data breach notification laws, including New Jersey's Identity Theft Prevention Act.

7. Policy Changes

We may update this Privacy Policy from time to time. Material changes — including new categories of personal data collected, new categories of third-party recipients, or changes to your rights — will be communicated via an in-app prompt before taking effect.

Non-material updates — such as switching a service provider within an existing category, adjusting server-side configuration, UI navigation changes, clarifications to existing practices, or adding app features that collect or use data categories already described in this policy in substantially the same manner — may be made without advance notice. The current policy is available at this page. Your continued use of the app constitutes acceptance of the current policy.

8. Children's Privacy

Miku is not directed at children under 13 years of age (or under 16 in the European Economic Area, consistent with GDPR Art. 8). We do not knowingly collect personal information from children below these ages. If you believe a child has provided personal information through Miku, please contact us at support@prasergames.com and we will promptly delete it.

9. Your Rights

Depending on where you live, you may have the following rights regarding your personal data:

• Access (GDPR Art. 15) — request a copy of the data we hold about you.
• Rectification (GDPR Art. 16) — request correction of inaccurate personal data we hold about you.
• Erasure (GDPR Art. 17) — request deletion of your data (see Data Retention & Deletion above).
• Restriction (GDPR Art. 18) — request that we restrict processing of your data in certain circumstances.
• Portability (GDPR Art. 20) — request your server-side data in a machine-readable format. Chat messages are transmitted to our AI provider when you send them, but PraserGames does not retain server-side chat history; the encrypted local copy on your device is the only copy we keep. Because we do not hold a server-side copy, conversation content is not included in your data export. You can read your conversations directly in the app at any time from the chat screen.
• Objection (GDPR Art. 21) — object to processing of your data for analytics or crash reporting purposes. You can disable analytics in the app's privacy settings. To object to crash report data being linked to your identifier, contact us at support@prasergames.com.
• Withdraw consent — where processing is based on your consent (community features, feedback), you may withdraw consent at any time by leaving those features or deleting your account. Withdrawal does not affect the lawfulness of processing before withdrawal.
• Automated decision-making (GDPR Art. 22) — Miku uses AI to generate chat responses. These responses do not produce legal effects or similarly significant effects on you within the meaning of GDPR Art. 22. Accordingly, no automated decision-making subject to Art. 22 is performed.
• Supervisory authority complaint (GDPR Art. 77) — if you are in the European Economic Area, you have the right to lodge a complaint with your local data protection supervisory authority.
• CCPA/CPRA (California) — PraserGames LLC does not sell personal information. California residents may request: disclosure of data categories collected and their purposes; deletion of personal information; correction of inaccurate personal information; and to opt out of any sale or sharing of personal information (we do not sell or share personal information for cross-context behavioral advertising).
• Do Not Track — Miku does not respond to Do Not Track (DNT) browser signals, as there is no industry-standard interpretation for mobile applications. You can control analytics collection via the app's privacy settings.

To exercise any of these rights, contact us at support@prasergames.com. We will respond within 30 days.

10. Governing Law

This Privacy Policy is governed by and construed in accordance with the laws of the State of New Jersey, United States, without regard to its conflict of law provisions.

11. Contact

If you have questions about this privacy policy or how your data is handled, please contact us at support@prasergames.com.

PraserGames LLC does not meet the threshold for mandatory appointment of a Data Protection Officer under GDPR Art. 37, as its processing activities do not consist of large-scale processing of special categories of data or systematic monitoring of individuals.

PraserGames LLC · New Jersey, United States