Privacy Policy
Last updated: July 2026
Defog (“we,” “us,” or “our”) is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and protect your information when you use our mobile application or related services (“Services”).
If you do not agree with this Privacy Policy, please do not use Defog.
Information We Collect
We collect the following types of information:
1. Information You Provide
- Email address for account creation and authentication
- Display name
We do not collect profile photos or images uploaded by users.
2. Progress and Journal Data
To help you reduce or quit smoking and nicotine use, Defog stores information you choose to enter, such as your goals, milestones, cravings logs, journal entries, and messages you send to the AI assistant. This data is stored privately and is used only to provide the Services to you. You can clear it in the app at any time.
We do not read your private entries. They are processed only to provide the service.
3. Device Information
- Device model, OS version, and related technical information (for security and core functionality)
We do not collect precise location, behavioral advertising data, or advertising identifiers.
How We Use Your Information
We use your information to:
- Provide, improve, and personalize the Services
- Authenticate users and secure accounts
- Maintain app functionality and prevent abuse
- Comply with legal obligations
We do not sell your data. We do not use your content to train machine learning models.
Health-Related Information
Information you enter about your habit, cravings, or progress is personal to you. We treat it as private and never sell it or use it for advertising. Defog does not access Apple Health or share this information with third parties for marketing purposes.
AI Processing
User input may be processed by trusted AI service providers (such as OpenAI) solely to generate real-time responses. According to their policies, your data is not used for model training.
Data Retention
- Account data is kept until you delete your account
- Progress and journal data is kept until you delete it manually or delete your account
- Technical security data may be kept briefly to maintain service integrity
Data Sharing
We may share data only with:
- Service providers who support app functionality (e.g., Supabase, OpenAI API)
- Authorities if required for legal compliance or safety
We never share your personal data for advertising purposes.
Security
We use industry-standard safeguards, including:
- Encryption in transit (HTTPS)
- Encryption at rest via our service providers
No system can be fully secure, though we work hard to protect your data.
Children’s Privacy
Defog is for users 18 years and older. We do not knowingly collect personal data from children. If we discover such data, we will delete it promptly.
Your Data Rights
- Delete your account (and all associated data) via the in-app delete feature
- Request help by contacting us if needed
Email: hello@decagrowth.co
Changes to This Policy
We may update this Privacy Policy as needed. Continued use of Defog means you accept the updated policy.
Contact Us
If you have any questions, please contact us at hello@decagrowth.co.