Effective date: June 5, 2026
Last updated: June 5, 2026
Mocco Group ("we", "our", or "us") operates the Langera Android application (the "App"). This Privacy Policy explains what information we collect, how we use it, who we share it with, and the choices you have over your data.
By creating an account or using the App, you agree to this Privacy Policy. If you do not agree, please do not use the App.
| Data | Purpose |
|---|---|
| Email address | Account creation and authentication |
| First and last name | Personalizing your experience |
| Native language | Tailoring vocabulary and explanations |
| Profile photo (optional) | Displayed on your profile |
| Learning interests and themes | Personalizing content recommendations |
| Occupation and location (optional) | Generating relevant speaking phrases |
Learning progress data:
Device and usage data:
When you use the Speak feature, the App uses the RECORD_AUDIO permission to capture your voice and assess pronunciation. Audio is processed in real time by Microsoft Azure Cognitive Services (Speech SDK). We do not store raw audio recordings on our servers. Only the resulting pronunciation score and metadata are saved to your profile.
You can revoke microphone access at any time via Android Settings → Apps → Langera → Permissions → Microphone.
The Android widget displays your daily task completion status, XP, and streak from a local data store on your device. This data is not transmitted to our servers through the widget.
If you grant the POST_NOTIFICATIONS permission (required on Android 13+), we send one daily practice reminder at approximately 9:00 AM. You can disable notifications at any time via the Account screen in the App or via Android Settings → Apps → Langera → Notifications.
We use collected information to:
We do not use your data for advertising, sell it to third parties, or use it to train AI/ML models outside your explicit speaking sessions.
We use Supabase as our backend database, authentication provider, and file storage. Your profile data, vocabulary progress, session history, and uploaded avatar are stored on Supabase infrastructure hosted in the EU (AWS Frankfurt region by default). Supabase is GDPR-compliant and SOC 2 Type 2 certified. Review their Privacy Policy.
Pronunciation assessment audio streams are sent to Azure Cognitive Services in real time. Microsoft processes audio only to return a pronunciation score; audio is not retained by Microsoft beyond the duration of the API call. Review the Microsoft Privacy Statement.
Subscription billing is handled by Google Play Billing. We never receive or store your payment card information. Google's handling of payment data is governed by the Google Privacy Policy.
We may use Firebase Crashlytics to collect anonymized crash reports and device metadata (OS version, device model, app version) to diagnose issues. No personally identifiable information is included in crash reports. Review the Google Firebase Privacy Policy.
| Permission | Why we need it |
|---|---|
RECORD_AUDIO | Voice capture for speaking practice and pronunciation scoring |
POST_NOTIFICATIONS | Daily practice reminders (Android 13+) |
READ_MEDIA_IMAGES | Selecting a profile photo from your gallery |
INTERNET | Syncing progress, loading vocabulary content, and authentication |
RECEIVE_BOOT_COMPLETED | Restoring scheduled daily reminders after device restart |
All permissions are requested at runtime and only when the relevant feature is first used. You may deny or revoke any permission at any time — doing so disables only the associated feature.
| Data type | Retention period |
|---|---|
| Account and profile data | Until you delete your account |
| Vocabulary and session progress | Until you reset progress or delete your account |
| Speaking scores | Until you reset progress or delete your account |
| Avatar images | Until you replace or delete them |
| Server logs | 30 days, then automatically deleted |
| Crash reports | 90 days (anonymized) |
When you delete your account (via Account → Danger Zone → Delete Account), we permanently delete all associated personal data from our systems within 30 days, except where retention is required by law.
We implement industry-standard security measures including:
If you become aware of a security incident, please contact us at privacy@langera.app.
All users:
EU / EEA residents (GDPR):
You additionally have the right to object to processing, restrict processing, and lodge a complaint with your local supervisory authority.
California residents (CCPA):
You have the right to know what personal information is collected, the right to delete, and the right to opt out of sale (we do not sell personal information).
To exercise any right, contact us at privacy@langera.app. We will respond within 30 days.
Langera is not directed at children under 13 (or 16 in the EU). We do not knowingly collect personal information from children. If you believe a child has provided us with personal data, contact us and we will delete it promptly.
If you are located outside the European Union, your data may be transferred to and processed in countries where our service providers operate. These transfers are subject to appropriate safeguards including Standard Contractual Clauses.
We may update this Privacy Policy from time to time. We will notify you of material changes by updating the "Last updated" date and, where appropriate, sending an in-app notification.
Mocco Group
Email: privacy@langera.app
App: Langera
Package: com.moccotech.langera
For data deletion requests or privacy questions, email us directly. We aim to respond within 5 business days.