Privacy Policy

This Privacy Policy describes how Vastflow LLP (“Vastflow”, “we”, “our”, “us”) collects, uses, and protects user data across our website, browser extensions, and mobile applications.

1. Scope

This policy applies to all digital products by Vastflow, including:

  • The website vastflow.kz
  • Chrome extensions, such as TeleStream Saver
  • Mobile applications for iOS and Android

2. Information We Collect

Depending on the product, we may collect the following types of data:

  • Usage Data: Pages visited, features used, buttons clicked
  • Device Data: Browser type, device model, OS version, language
  • Identifiers: Advertising ID (for mobile apps), IP address (anonymized where possible)
  • Subscription or Payment Data: If in-app purchases or premium features are involved

3. Services and Tools Used

We may use the following third-party tools to help us improve performance, monitor usage, and support monetization:

  • Google Analytics – website and app usage analytics
  • Yandex Metrica – heatmaps and user behavior tracking on the website
  • AppMetrica – analytics for mobile applications
  • Adapty – in-app subscriptions and paywall management
  • AppsFlyer – install attribution for mobile ads
  • AssemblyAI – speech-to-text conversion in selected applications
  • OpenAI – powering certain AI-based features (e.g., content generation, summarization)

4. TeleStream Saver – Chrome Extension

TeleStream Saver is a Chrome extension that allows users to download video and audio messages from Telegram Web.

  • The extension does not collect, store, or transmit personal data
  • It does not use chrome.storage, identity, or any background tracking
  • It requests permission only to inject a download button on Telegram Web interfaces (web.telegram.org and subdomains)
  • It does not connect to any external API or analytics service

5. Data Security

We apply industry-standard security practices to protect collected data. Some data is stored locally on user devices; some may be processed through secure servers or third-party platforms, depending on the product.

6. Data Sharing

We do not sell or rent your personal data. Data may be shared with third-party processors only when necessary for core features or analytics, in compliance with their respective privacy policies.

7. User Consent

By using our products, you consent to the terms of this Privacy Policy. Some applications may request explicit permission before accessing sensitive data or services.

8. Contact Us

For any questions, please contact us at [email protected].