tengri.

Privacy Policy for Mindflow

Last Updated: December 3, 2025

1. Overview

Mindflow ("the App") is a privacy-first spaced repetition application developed by Tengri Vertex. We believe your learning data belongs to you. This policy explains how we handle your information.

2. Data Collection

Local Storage

Mindflow is designed as a "Local First" application.

  • Flashcards & Decks: All your study materials are stored locally on your device using an encrypted database.
  • Progress: Your study history and SRS (Spaced Repetition System) scheduling data are stored locally.

We do not have access to your decks, cards, or study habits.

Subscriptions

We use RevenueCat to manage subscriptions.

  • When you purchase a subscription, RevenueCat processes an anonymous App User ID to validate your purchase status.
  • We do not receive or store your credit card information or billing address. All payments are handled directly by Apple (App Store).

3. Third-Party Services

We use the following third-party services to ensure the App functions correctly:

4. Security

We implement industry-standard security measures to protect your data. Since your primary data (decks/cards) is stored locally on your device, it is protected by your device's built-in security features (passcode, FaceID, sandbox environment).

5. Contact Us

If you have any questions about this Privacy Policy, please contact us at: