Cookie Policy
Last updated: March 18, 2026
What Are Cookies?
Cookies are small text files that are stored on your device when you visit a website. They help the website remember your preferences and understand how you interact with the site.
QrLens uses cookies and similar technologies (such as localStorage) to provide and improve our Service.
Types of Cookies We Use
Essential (localStorage)
These are required for QrLens to function properly. They are stored locally on your device and are never sent to our servers.
| Name | Purpose | Duration |
|---|---|---|
| qrlens-history | Stores your QR code scan history | Persistent |
| qrlens-favorites | Stores your favorited QR codes | Persistent |
| qrlens-settings | Stores your app preferences | Persistent |
| theme | Stores your light/dark theme preference | Persistent |
Analytics (Google Analytics 4 via Google Tag Manager)
These cookies help us understand how visitors use QrLens so we can improve the experience. They are only set with your consent.
| Name | Purpose | Duration |
|---|---|---|
| _ga | Distinguishes unique users for Google Analytics | 2 years |
| _ga_* | Maintains session state for GA4 | 2 years |
Marketing (Google AdSense)
These cookies are used to display relevant advertisements. They are only set with your consent.
| Name | Purpose | Duration |
|---|---|---|
| __gads | Ad serving and frequency capping | 13 months |
| __gpi | Ad personalization identifier | 13 months |
| NID | Google ad preferences and targeting | 6 months |
Consent Management
When you first visit QrLens, you will see a cookie consent banner. You can choose to:
- Accept all — Enable all cookies including analytics and marketing
- Essential only — Only use essential localStorage (no analytics or ads)
You can change your preferences at any time through the cookie settings in the footer of our website.
How to Manage Cookies
You can control cookies through your browser settings. Most browsers allow you to:
- View what cookies are stored
- Delete individual or all cookies
- Block cookies from specific or all websites
- Block third-party cookies
- Clear all cookies when you close the browser
Note that blocking essential localStorage may prevent QrLens from functioning properly. Your scan history, favorites, and settings will not be saved if localStorage is disabled.
Third-Party Cookies
Some cookies on QrLens are set by third-party services. These include:
- Google — Analytics (GA4) and advertising (AdSense) cookies
- Stripe — May set cookies during payment processing
We do not control third-party cookies. Please refer to the respective privacy policies of these services for more information.
Contact Us
If you have questions about our use of cookies, please contact us:
- Email: privacy@qrlens.app
- Company: Cloud Solution Berlin GmbH