Privacy policy

1.1 Interpretation

Words with capitalized initial letters have meanings defined under the following conditions. The definitions apply whether the terms appear in singular or plural.

1.2 Definitions

• Account means the unique account created for You to access the Service.
• Application means the mobile application titled Flun.
• Company, We, Us, or Our means LangRun, LLC., a Delaware corporation, United States.
• Device means any device that can access the Service, such as a smartphone or tablet.
• Personal Data means information that identifies, relates to, describes, or can reasonably be linked to an individual.
• Health Data means information You provide related to Your physical characteristics, nutrition, health status, goals, or activities.
• Usage Data means data collected automatically when using the Service.
• User Content means photos, images, text, voice inputs, logs, metadata, or other information You submit through the Service.
• Website means any Flun-controlled website or landing page.
• You means the individual using the Service or the entity on whose behalf the Service is used.

2.1 Personal Data You Provide

When You create an Account or use the Service, We may collect:

• First and last name
• Email address
• Optional profile information You choose to provide

2.2 Health, Nutrition, and Activity Data

To provide personalized nutrition tracking and guidance, We may collect:

• Weight and height
• Food logs (including photo, voice, text, or favorite entries)
• Nutrition and macro goals
• Activity logs and exercise information
• Progress photos (if You choose to upload them)
• Any other health-related information You voluntarily enter

You control what health information You provide. Certain features require basic nutrition or activity data to function properly.

2.3 User Content (Including Photos and Voice Inputs)

User Content may include:

• Photos of meals, nutrition labels, or activity screens
• Voice descriptions of food or activity
• Text entries, logs, and notes

Model Improvement Use:

We may use anonymized or aggregated food images, descriptions, and related metadata to improve internal models and product performance. Such data is not linked to Your identity when used for these purposes.

Important:

• Progress photos are never used for model training.
• We do not publicly display Your User Content without Your explicit consent.

2.4 Usage Data

We automatically collect certain information, including:

• Device type, operating system, and app version
• IP address and general location (e.g., country or region)
• Time stamps and interaction logs
• Feature usage metrics
• Crash reports and performance diagnostics

This data helps Us operate, secure, and improve the Service.

2.5 Cookies and Tracking Technologies

Our Website may use cookies or similar technologies for functionality, analytics, and security. The Application may use mobile identifiers for analytics and performance monitoring.

3.1 To Provide and Operate the Service

• Food recognition and calorie estimation
• Nutrition and activity tracking
• Personalized insights and guidance
• Account creation and management
• App stability, debugging, and support

3.2 To Improve AI and Product Performance

We use anonymized or aggregated data to:

• Improve estimation accuracy
• Enhance personalization logic
• Test and refine internal systems

No identifiable health or personal data is used for public or external training purposes.

3.3 Communications

We may contact You regarding:

• Account-related notifications
• Feature updates or changes
• Customer support requests

3.4 Marketing (Optional)

We may send promotional or educational emails. You may opt out at any time via email settings or unsubscribe links.

3.5 Legal, Safety, and Compliance

We may process data to:

• Detect and prevent fraud or misuse
• Enforce our terms
• Comply with legal obligations
• Protect the rights and safety of Flun and its users

3.6 Business Transactions

If Flun is involved in a merger, acquisition, financing, or asset sale, Your information may be transferred as part of that transaction, subject to applicable law.

5.1 Service Providers

With trusted vendors who help operate the Service, including:

• Google Firebase — Authentication (name, email), cloud data storage (Firestore), image storage (Cloud Storage), push notifications (FCM), and crash reporting (Crashlytics). Crash logs and diagnostic data are collected to identify and fix app issues.
• OpenAI — Meal photos submitted for nutrition analysis are sent to OpenAI's API for processing. Photos are processed in real-time and are not retained by OpenAI under their API data usage policy.
• PostHog — Anonymized app usage analytics (screen views, feature interactions) are collected to improve the app experience. No personally identifiable information is shared with PostHog.
• RevenueCat — Subscription purchase data is managed through RevenueCat to process in-app purchases and manage subscription status.
• Google Sign-In / Apple Sign-In — Authentication is handled through Google and Apple's sign-in services. We receive Your name and email address from these providers.

These providers are contractually required to protect Your data and are bound by their respective privacy policies and data processing agreements. We do not sell Your Personal Data to any third party.

5.2 Legal Requirements

When required by law, subpoena, or governmental request.

5.3 Business Transfers

As part of mergers, acquisitions, or similar transactions.

5.4 With Your Consent

When You explicitly authorize sharing.

5.5 Aggregated or Anonymized Data

We may share non-identifiable data for analytics, research, or business purposes.