Cookie Policy
Last Updated: January 11, 2026
1. What Are Cookies?
Cookies are small text files that are stored on your device (computer, smartphone, tablet) when you visit websites. They help websites remember your preferences, track your activities, and provide a better user experience.
BidBrain uses cookies and similar tracking technologies (collectively referred to as “cookies”) to operate our service effectively and improve your experience.
2. How We Use Cookies
We use cookies for several purposes:
- Essential Operations: Authentication, security, and core functionality
- User Preferences: Remember your settings and choices
- Analytics: Understand how you use our service
- Performance: Monitor and improve service performance
- Security: Detect fraud and abuse
3. Types of Cookies We Use
3.1 Essential Cookies (Strictly Necessary)
These cookies are required for the website to function and cannot be disabled.
| Cookie Name | Purpose | Duration |
|---|---|---|
| firebase-auth-token | User authentication and session management | Session / 30 days |
| csrf-token | Security protection against cross-site request forgery | Session |
| session-id | Maintain user session state | Session |
3.2 Functional Cookies (Preferences)
These cookies remember your preferences and choices to enhance your experience.
| Cookie Name | Purpose | Duration |
|---|---|---|
| theme-preference | Remember dark/light mode preference | 1 year |
| language | Remember language preference | 1 year |
| onboarding-completed | Track whether onboarding tour was completed | 1 year |
3.3 Analytics Cookies (Performance)
These cookies help us understand how users interact with our service so we can improve it.
| Cookie Name | Purpose | Duration |
|---|---|---|
| _ga | Google Analytics — distinguish users | 2 years |
| _ga_* | Google Analytics — persist session state | 2 years |
| _gid | Google Analytics — distinguish users | 24 hours |
We use Google Analytics 4 with IP anonymization enabled. Learn more about Google’s privacy practices.
3.4 Security Cookies
These cookies help us detect and prevent security threats.
| Cookie Name | Purpose | Duration |
|---|---|---|
| rate-limit | Track API request rates to prevent abuse | 15 minutes |
| fingerprint | Detect fraudulent activity | Session |
4. Third-Party Cookies
Some cookies are set by third-party services we use:
4.1 Firebase / Google Cloud
Used for authentication and database services. See Google’s Privacy Policy.
4.2 Stripe
Used for payment processing. Stripe sets cookies to detect fraud and provide secure checkout. See Stripe’s Privacy Policy.
4.3 Google Analytics
Used to analyze website traffic and user behavior. See Google’s Cookie Policy.
4.4 Sentry
Used for error tracking and monitoring. See Sentry’s Privacy Policy.
5. Local Storage and Session Storage
In addition to cookies, we use browser storage technologies:
- Local Storage: Stores user preferences, cached data, and application state
- Session Storage: Temporarily stores data during your browsing session
These technologies function similarly to cookies but store more data and are not sent with every server request.
6. How to Control Cookies
6.1 Browser Settings
Most browsers allow you to control cookies through their settings:
- Chrome: Settings → Privacy and Security → Cookies and other site data
- Firefox: Settings → Privacy & Security → Cookies and Site Data
- Safari: Preferences → Privacy → Cookies and website data
- Edge: Settings → Cookies and site permissions → Cookies and site data
6.2 Opt-Out Options
- Google Analytics Opt-Out: Install Google Analytics Opt-out Browser Add-on
- Do Not Track: We respect browser “Do Not Track” signals for analytics cookies
6.3 Disabling Cookies Impact
If you disable cookies:
- Essential cookies: The website will not function properly
- Functional cookies: You’ll lose personalization and saved preferences
- Analytics cookies: No impact on functionality, but we can’t improve the service as effectively
7. Mobile Devices
Mobile devices use similar technologies:
- iOS: Settings → Safari → Block All Cookies
- Android: Chrome App → Settings → Site Settings → Cookies
8. Cookie Duration
Cookies are classified by duration:
- Session Cookies: Deleted when you close your browser
- Persistent Cookies: Remain until expiration date or manual deletion
9. Updates to This Policy
We may update this Cookie Policy to reflect changes in our practices or legal requirements. We will notify you of material changes by:
- Updating the “Last Updated” date at the top
- Displaying a prominent notice on our website
10. Your Consent
By using BidBrain, you consent to the use of cookies as described in this policy. You can withdraw consent at any time by:
- Adjusting your browser settings
- Using the cookie preference center (if available)
- Contacting us to discuss your options
11. GDPR and ePrivacy Compliance
For users in the European Economic Area:
- We only use strictly necessary cookies without consent
- All other cookies require your consent
- You can withdraw consent at any time
- Withdrawing consent does not affect prior data processing
12. Contact Us
If you have questions about our use of cookies:
Email: privacy@bidbrainapp.com
Support: bidbrainapp@gmail.com
13. Additional Resources
- All About Cookies — Comprehensive cookie information
- UK ICO Cookie Guide — Official guidance on cookies
We use cookies to provide you with the best experience on BidBrain. Essential cookies are necessary for the site to work, while others help us understand usage and improve our service.