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Gantt Planet — Privacy Policy

Last Updated: 2026-04-15

1. Overview
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Gantt Planet, developed by QQder339, is a life goal management app combining 3D visual habit tracking with an on-device AI companion.

In short: We do NOT collect, store, or transmit any of your personal data to external servers. Your habits, journals, and conversations belong only to you.

2. Data We Do NOT Collect
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This app does not collect:

  • Personally Identifiable Information (name, email, phone number)
  • Location data
  • Device identifiers
  • Usage analytics or tracking data

3. Locally Stored Data
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The following data is stored strictly on your device and never transmitted externally:

  • Habits & Goals: All items, completion records, and timeline data
  • AI Conversation Logs: All conversations with the built-in AI stored locally
  • Journals & Mood Records: All journal content
  • Art Collection: Unlocked stickers and illustration records
  • 3D Planet State: Your planet’s terrain and growth data
  • User Settings: All preference settings

4. Offline AI Features
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The AI companion feature runs entirely on-device:

  • AI Conversations: Uses local Large Language Models (LLM); all inference runs on-device; conversation content is never transmitted to any server
  • Model Download: AI models require a one-time download before first use (user-initiated); fully offline after download

5. Third-Party Services
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This app does NOT use any third-party analytics or advertising frameworks (No Google Analytics, No Facebook SDK, No Ads).

6. Network Access
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Network access is restricted to:

  • Downloading AI Models (Optional, one-time): Only connects when you explicitly choose to download
  • Downloading Art Collection Stickers (On-demand): When you unlock art rewards, the app fetches matching images from a public GitHub repository and caches them locally for offline use
  • Weather Information (Optional): If you enable real weather, only minimal regional data is sent to retrieve weather
  • External Links: Opens browser when tapping relevant links

These requests transmit only the URL of the resource you chose or triggered; no personally identifiable information is attached.

7. Contact Us
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📧 qqder339@gmail.com
Subject: Gantt Planet Privacy Policy Inquiry