Privacy Policy

ReadNihongo (“the App”, “we”, “us”, or “our”) is a language-learning application owned and operated by Elm and Ink LLC, 3540 Library Dr, Cudahy, WI 53110, USA.

Category Specific data Why we collect it Account Data • Email address (required) • Display name (optional) • Authentication tokens (e.g., Google OAuth) • Create and secure your account • Sync progress across devices Learning Progress • Story completions, XP, streaks • Lesson attempts and scores Personalise content and show your dashboard Device & Log Data • Device model, OS version, app version • IP address, timezone, language • Crash reports (via Sentry) Debug errors, fight fraud, improve stability Advertising Identifiers Google AdMob ID & similar mobile ad IDs Serve rewarded / banner ads and measure performance Support Correspondence Emails or calls you make to us Respond to inquiries and provide support We do not collect sensitive categories of data such as health, biometric, or precise-location information.

Provide the service – store lessons, track XP, and sync your progress via Supabase. Authenticate users – let you log in with email or Google. Personalise learning – surface stories and vocabulary that suit your level. Display ads – keep the App free by showing Google AdMob ads; some lessons unlock after watching a rewarded video. Maintain & improve – analyse crash logs (Sentry) and usage patterns to fix bugs and plan features. Legal compliance – keep records required by law and defend our rights if needed.

Purpose Legal basis Account creation & sync Contract – necessary to deliver the App Personalised analytics Legitimate interest – tailoring content benefits users Advertising & measurement Consent – granted or denied in the in-app prompt Crash reporting & security Legitimate interest – essential for reliability and safety

Service Data shared Protections Supabase (database & auth) Account data, study progress Encrypted in transit & at rest; ISO-27001 hosting Google AdMob Advertising IDs, device info Ad personalisation follows Google EU User Consent Policy Sentry Anonymised crash traces, device model, OS IP truncated; logs auto-purged after 90 days We never sell personal data.

Data type Retention period Account & progress Until you delete your account or 24 months of inactivity Crash logs 90 days Support correspondence 12 months after ticket closure

Access – obtain a copy of your data. Correction – fix inaccurate info. Deletion – delete your account and associated data. Restriction / Objection – limit or object to certain processing. Portability – export your progress in a machine-readable file. To exercise any right, email Contact@ReadNihongo.com from the address linked to your account. We respond within 30 days. California residents also have rights under the CCPA; Elm and Ink LLC does not “sell” personal information as defined by the CCPA.

Our primary servers are in the United States. If you access the App from another country, your data will be transferred to the U.S. We rely on Standard Contractual Clauses (SCCs) or equivalent safeguards where required.

TLS 1.2+ encryption for all data in transit. Encrypted storage for Supabase volumes. Role-based staff access with audit logs. Regular reviews of Supabase, Sentry, and AdMob configurations.

ReadNihongo is not directed to children under 13 (or 16 in the EU). If you believe a child has provided personal information, please contact us so we can delete it.

We may update this Privacy Policy for legal or operational reasons. We post changes in-app and on readnihongo.com/privacy. Material changes will be announced via an in-app banner or email.

Elm and Ink LLC 3540 Library Dr Cudahy, WI 53110 United States Email: Contact@ReadNihongo.com Phone: (414) 485-4659 Last updated: 6 June 2025