Weight Scale

Privacy Policy

Last updated: March 21, 2026

ProcessFlow, Inc. ("we", "us", or "our"), doing business as Weight Scale, operates the Weight Scale mobile application (the "App"). This Privacy Policy explains how we collect, use, and protect your information.

Information We Collect

Weight Scale is designed with privacy in mind. We collect minimal data to provide our service:

  • Anonymous Authentication: We use Firebase Anonymous Authentication to create a unique identifier for your device. No personal information (name, email, phone number) is collected.
  • Scan Counter: We maintain a count of scans performed per anonymous user ID in Firebase Firestore. This is used solely to enforce free-tier limits.
  • Camera Images: When you scan an object, the photo is sent to Google's Gemini API via a Firebase Cloud Function for weight estimation. Images are processed in real-time and are NOT stored on our servers.
  • Analytics: We use PostHog for anonymous usage analytics and session recording to improve the app experience. No personally identifiable information is tracked.
  • Error Monitoring: We use Sentry to capture error logs for debugging purposes. No personal data is included in error reports.

How We Use Your Information

We use the limited data we collect to:

  • Provide AI-powered weight estimation via the Gemini API
  • Enforce free-tier scan limits (3 free scans)
  • Improve app performance and fix bugs
  • Understand anonymous usage patterns to improve the product

Third-Party Services

Weight Scale uses the following third-party services:

  • Firebase (Google) — Anonymous authentication and Cloud Functions for Gemini API proxy
  • Google Gemini API — AI image processing for weight estimation
  • PostHog — Anonymous analytics and session recording
  • Sentry — Error monitoring and crash reporting
  • Apple StoreKit 2 — Subscription payment processing (handled entirely by Apple)

Data Sharing

We do NOT sell, trade, or share your personal data with third parties. We do not serve advertisements. The only data transmitted to third parties is the camera image sent to Google's Gemini API for processing, which is not stored.

Children's Privacy

Weight Scale does not knowingly collect personal information from children under 13. Since we use anonymous authentication and collect no personal data, the app is safe for all ages.

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date.

Contact Us

If you have any questions about this Privacy Policy, please contact us at contact@lume.gg.