Privacy Policy - MUYO LLC

Muyo LLC ("we," "our," or "us") operates a variety of mobile applications designed to support learning, creativity, and personal growth. This Privacy Policy describes how we handle information across all Muyo LLC apps, including but not limited to:

Duoshuo 多说 – a language learning and speech practice app
Murmur 轻倾 – a motivational quote and image editing app

By using our apps or website, you agree to the terms of this Privacy Policy.

1. Information We Collect

Our apps are designed to minimize data collection. We only access device features necessary to provide functionality, with your permission.

a. Microphone Access (Duoshuo)

Used for recording user speech to analyze pronunciation and provide feedback.
Audio is processed locally on your device or securely transmitted for scoring.
No voice data is stored permanently or shared with third parties.

c. Photos / Media Access (Murmur)

Used only when you choose to select or edit a photo as a quote background.
Images remain on your device and are not uploaded, stored, or shared externally.

b. Internet Access (Duoshuo, Murmur)

Used to connect with Azure Speech Service for pronunciation scoring. (Duoshuo)
Used to retrieve motivational quotes and content from Google Firestore database. (Murmur)

d. App Usage and Analytics

We may use anonymous analytics (e.g., Google Firebase) to understand general app performance and crashes.
These analytics do not identify you personally and help us improve stability and user experience.

e. Device Information (standard)

When analytics are enabled, they may include non-identifiable data such as device model, operating system, app version, and performance metrics.

2. How We Use Information

We use collected information solely to:

Operate and improve app functionality.
Provide speech scoring or image customization features.
Diagnose and fix technical issues.
Communicate app updates or important notices.

We do not sell, rent, or trade user data.

3. Data Storage and Security

We apply reasonable technical and organizational measures to protect your information.
If cloud services are used (e.g., Azure or Firebase), data is encrypted in transit and at rest.
No personally identifiable information is retained longer than necessary.

4. Children's Privacy

Our apps are intended for general audiences.
We do not knowingly collect personal information from children under 13 years old.
If you believe your child has provided such data, please contact us, and we'll delete it promptly.

5. Third-Party Services

Our apps may include third-party SDKs or APIs (e.g., Azure Speech Service, Google Firebase) that operate under their own privacy terms. We encourage users to review their policies for more details:

6. Your Choices

You can:

Decline microphone or photo permissions in your device settings.
Delete the app at any time to remove all locally stored data.
Contact us to request deletion of any data that may have been temporarily processed for scoring or analytics.

Duoshuo 多说 - Language Learning App

Permissions Used:

Microphone: Required for speech practice and pronunciation feedback
Internet: To connect with Azure Speech Service for pronunciation scoring
Storage: To save learning progress locally

Data Handling:

Audio recordings are processed for pronunciation analysis only
No voice data is permanently stored or shared with third parties
Learning progress is saved locally on your device

Murmur 轻倾 - Motivational Quote & Image Editing App

Permissions Used:

Internet: To fetch motivational quotes and content from Firestore database
Photos/Media: Only when you choose to select a photo for quote backgrounds
Storage: To save edited images to your device

Data Handling:

Quotes and motivational content are retrieved from Google Firestore
All image editing happens locally on your device
Photos are not uploaded, stored on servers, or shared externally
You have complete control over your images

7. Changes to This Policy

We may update this Privacy Policy periodically.
Revisions will be posted with a new "Effective Date."
Your continued use of our apps after such updates means you accept the changes.

8. Contact Us

If you have questions, concerns, or requests related to privacy, please contact us:

Muyo LLC
Email: contact@muyollc.com
Website: https://muyollc.com