Developer Nathan
PRIVACY POLICY - HanFlow
Last updated: June 2026
Developer: Dev Nathan
App: HanFlow - Learn Chinese Daily
Package: com.hanflow.android
INTRODUCTION
Dev Nathan ("we", "us", "our") built the HanFlow app as a free educational application. This Privacy Policy explains how information is handled when you use our App.
By using HanFlow, you agree to this policy. If you do not agree, please do not use the App.
INFORMATION WE COLLECT
Local data on your device:
- Learning progress (phrases learned, lesson progress, streak)
- App preferences saved on your device
This data is stored locally on your phone or tablet and is not sent to our servers.
Third-party analytics and advertising:
HanFlow uses the Meta (Facebook) SDK for app analytics and ad measurement. Meta may collect:
- Device identifiers (such as Advertising ID)
- App install and open events
- Device type, OS version, and general usage data
- IP address and approximate location (country/region)
Meta's use of data is governed by Meta's Privacy Policy:
https://www.facebook.com/privacy/policy/
Text-to-speech:
When you use pronunciation features, text is processed by your device's built-in text-to-speech service (Google or device manufacturer). We do not operate our own speech servers.
INFORMATION WE DO NOT COLLECT
We do not collect:
- Name, email, or phone number (unless you email us for support)
- Passwords or payment details
- Precise GPS location
- Contacts, photos, microphone recordings, or messages
HanFlow does not require account registration.
HOW WE USE INFORMATION
We use information to:
- Save your learning progress on your device
- Measure app usage through Meta analytics
- Improve the App and support advertising on Meta platforms
We do not sell your personal information.
THIRD-PARTY SERVICES
- Meta SDK: analytics and ad measurement (Meta Platforms, Inc.)
- Device TTS: pronunciation playback
- Android OS: local storage
CHILDREN'S PRIVACY
HanFlow is for general audiences. We do not knowingly collect personal information from children under 13. Contact us if you believe a child has provided personal data.
YOUR CHOICES
- Uninstall the App to remove local data
- Clear app data: Android Settings > Apps > HanFlow > Storage > Clear data
- Limit ad tracking: Android Settings > Google > Ads
- Meta ad settings: https://www.facebook.com/adpreferences
DATA SECURITY
We use reasonable measures to protect information. No method of storage or transmission is 100% secure.
CHANGES
We may update this Privacy Policy. The new date will appear at the top. Continued use means you accept the updated policy.
CONTACT
Developer: Dev Nathan
Email: support@devnathan.app