Cookie Policy
Effective Date: February 25, 2026
1. What Are Cookies?
Cookies are small text files stored in a user's browser when visiting a website. Through cookies, websites can remember visit history and usage preferences to provide a better service experience.
Today Calculator (hereinafter "the Service") does not directly collect users' personal information, but third-party cookies are used for service analytics and advertising purposes.
2. Cookies We Use
2-1. Google Analytics (Statistical Analysis)
The Service uses Google Analytics 4 (GA4) for visitor statistics analysis. Collected data is processed in an anonymized form.
| Cookie Name | Purpose | Retention Period |
|---|---|---|
| _ga | Visitor identification (anonymous ID) | 2 years |
| _ga_* | Session state maintenance | 2 years |
Data collected: page views, visit duration, referral sources, device/browser/OS information, approximate location (country/city level)
2-2. Google AdSense (Advertising)
The Service uses Google AdSense for displaying advertisements. AdSense may use cookies to show ads relevant to users' interests.
| Cookie Name | Purpose | Retention Period |
|---|---|---|
| __gads | Ad display and performance measurement | 13 months |
| __gpi | Ad personalization | 13 months |
| DSID | Ad settings for non-logged-in users | 2 weeks |
| IDE | Ad retargeting | 13 months |
2-3. Service-Specific Cookies
The Service does not create its own cookies. Calculator state is managed through URL parameters and does not use localStorage or cookies.
3. How to Manage Cookies
Users can opt out of cookie collection or delete stored cookies through their browser settings. However, blocking cookies may affect the operation of ad-supported services.
- Chrome — Settings > Privacy and Security > Cookies and other site data
- Safari — Preferences > Privacy > Manage Website Data
- Firefox — Settings > Privacy & Security > Cookies and Site Data
- Edge — Settings > Cookies and site permissions > Manage and delete cookies and site data
To opt out of Google Analytics collection, install the Google Analytics Opt-out Browser Add-on.
To manage Google ad personalization, visit Google Ad Settings.
4. Changes to This Policy
If this Cookie Policy is updated, the changes will be posted on this page and the effective date will be updated.
5. Contact
If you have any questions about this Cookie Policy, please contact us through our contact form.