ReadNihongo App– Privacy Policy

Effective date: 6 June 2025

1. Who We Are

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.

2. Information We Collect

CategorySpecific dataWhy we collect itAccount Data• Email address (required)
• Display name (optional)
• Authentication tokens (e.g., Google OAuth)• Create and secure your account
• Sync progress across devicesLearning Progress• Story completions, XP, streaks
• Lesson attempts and scoresPersonalise content and show your dashboardDevice & Log Data• Device model, OS version, app version
• IP address, timezone, language
• Crash reports (via Sentry)Debug errors, fight fraud, improve stabilityAdvertising IdentifiersGoogle AdMob ID & similar mobile ad IDsServe rewarded / banner ads and measure performanceSupport CorrespondenceEmails or calls you make to usRespond to inquiries and provide support

We do not collect sensitive categories of data such as health, biometric, or precise-location information.

3. How We Use Your Data

  1. Provide the service – store lessons, track XP, and sync your progress via Supabase.

  2. Authenticate users – let you log in with email or Google.

  3. Personalise learning – surface stories and vocabulary that suit your level.

  4. Display ads – keep the App free by showing Google AdMob ads; some lessons unlock after watching a rewarded video.

  5. Maintain & improve – analyse crash logs (Sentry) and usage patterns to fix bugs and plan features.

  6. Legal compliance – keep records required by law and defend our rights if needed.

4. Legal Bases (GDPR)

PurposeLegal basisAccount creation & syncContract – necessary to deliver the AppPersonalised analyticsLegitimate interest – tailoring content benefits usersAdvertising & measurementConsent – granted or denied in the in-app promptCrash reporting & securityLegitimate interest – essential for reliability and safety

5. Third-Party Services

ServiceData sharedProtectionsSupabase (database & auth)Account data, study progressEncrypted in transit & at rest; ISO-27001 hostingGoogle AdMobAdvertising IDs, device infoAd personalisation follows Google EU User Consent PolicySentryAnonymised crash traces, device model, OSIP truncated; logs auto-purged after 90 days

We never sell personal data.

6. Data Retention

Data typeRetention periodAccount & progressUntil you delete your account or 24 months of inactivityCrash logs90 daysSupport correspondence12 months after ticket closure

7. Your Rights

  • 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.

8. International Transfers

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.

9. Security

  • 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.

10. Children’s Privacy

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.

11. Changes to This Policy

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.

12. Contact Us

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