AI Tutor — Privacy Policy
AI Tutor — Privacy Policy
PDL Engineering LLC ("we," "our," or "us") operates the AI Tutor mobile application ("App"). This Privacy Policy explains how information is collected, used, and protected when you use our App.
We do not collect personal information, require account registration. Your conversations stay private and are not used to identify or profile you.
To deliver AI tutor responses, your messages are transmitted to our backend service hosted on Google Cloud Run. This is the only data that leaves your device.
Text messages you type or speak are sent to our AI service to generate conversational tutor responses. This data is not used for advertising, user profiling, or tracking purposes.
Voice / microphone input is optional and only active when you tap the microphone button. Audio is processed entirely on-device by Android's speech recognition engine and converted to text. Only the resulting text is sent to our service — raw audio is never recorded, stored, or uploaded.
Text-to-speech output is generated on your device to read AI responses aloud. No audio data leaves your device via TTS.
Basic technical data such as app performance logs and error reports may be collected for debugging and monitoring app stability. We do not collect device identifiers, advertising IDs, or personal identifiers.
Voice gender preference ("Female" or "Male" TTS voice setting) is saved locally to remember your preference between sessions.
Session counter (a count of completed lessons) is stored locally and used to decide when to show the Play Store rating prompt.
Note on infrastructure logging: Google Cloud Run, which hosts our AI backend, automatically generates server-side logs that may include request data such as message content. These logs are used solely for debugging and performance monitoring, are not linked to any user identity, and are retained for no longer than 30 days.
INTERNET — Required to connect to the AI tutor service and receive responses.
RECORD_AUDIO / Microphone — Optional. Used only when you tap the microphone button. Audio is processed entirely on-device by Android's speech engine into text; raw audio is never recorded, stored, or uploaded.
ACCESS_NETWORK_STATE — Allows the App to check connectivity before making requests.
The App works fully without microphone permission — you can type all responses instead.
The App uses AI-powered language models hosted on Google Cloud to generate conversational tutor responses. All responses are generated automatically by AI systems. We do not use conversation data for advertising, user profiling, or AI model training.
The App uses the following external services:
Google Cloud Run — Hosts our AI tutor backend. Your chat messages are sent here over HTTPS to generate responses. See Google Cloud Privacy Notice.
Android Text-to-Speech (on-device) — Reads AI responses aloud. Operates entirely on your device; no audio data leaves the device via TTS.
Android Speech Recognition (on-device) — Converts spoken French to text when you use the microphone button. Processed locally by your device's speech engine.
Google Play In-App Review API — Prompts you to rate the App after several lessons. No data is collected by us through this API.
We do not sell user data. We do not share data with advertisers.
Conversation messages are not stored by us after a response is delivered.
Google Cloud Run infrastructure logs may be retained for up to 30 days for debugging and performance monitoring.
Log data is not linked to individual users or personal identifiers.
Preferences stored on your device (voice setting, session counter) remain until you uninstall the App or clear app data in Android settings.
This App is not directed at children under the age of 13. We do not knowingly collect personal data from children under 13. If you believe a child under 13 has used the App, please contact us and we will take appropriate steps.
Because no personal data is stored on our servers, there is no user profile to delete. Parents are encouraged to supervise internet usage for younger children.
The App does not create user accounts and does not retain personal user profiles. No registration or login is required to use the App.
All communication between the App and our backend service is encrypted using HTTPS/TLS. Cleartext (unencrypted) network traffic is blocked at the Android system level via network security configuration.
You may contact us to:
Ask questions about how data is used
Request clarification or deletion of any logged data (where applicable)
Report any privacy concerns
Because no personal identifiers are collected, we cannot link log data to a specific user. You can remove all locally stored preferences at any time by clearing the App's data in Android settings or by uninstalling the App.
If this privacy policy changes materially, we will update the "Effective" date at the top of this page. Continued use of the App after any changes constitutes acceptance of the updated policy. We encourage you to review this page periodically.
Last updated: February 16, 2026