Cookie Policy
Last updated: March 2026
1. What are cookies?
Cookies are small text files placed on your device when you visit a website. They help the site remember your preferences, understand how you use it, and deliver relevant content. Some cookies are essential for the site to work; others are optional and require your consent.
2. Cookies we use
Essential Cookies
Always active. Required for CalcStack to function.
| Cookie | Purpose | Duration |
|---|---|---|
| calcstack_consent | Stores your cookie consent preferences | 365 days |
| cs_access | Stores your verified email for premium access | 30 days |
Analytics Cookies
Optional. Help us understand how visitors use CalcStack.
| Cookie | Purpose | Duration |
|---|---|---|
| _ga | Google Analytics — distinguishes users | 2 years |
| _ga_* | Google Analytics — maintains session state | 2 years |
Advertising Cookies
Optional. Used by Google AdSense to display relevant ads.
| Cookie | Purpose | Duration |
|---|---|---|
| __gads | Google ad serving and frequency capping | 13 months |
| __gpi | Google Publisher tag identifier | 13 months |
| NID | Google ad personalisation preferences | 6 months |
| IDE | DoubleClick — ad targeting and measurement | 13 months |
Third-party Cookies
Set by payment and service providers.
| Cookie | Purpose | Duration |
|---|---|---|
| __stripe_mid / __stripe_sid | Stripe — fraud prevention during checkout | 1 year / 30 min |
3. How to manage cookies
Our consent tool: When you first visit CalcStack, a cookie banner lets you accept all cookies or choose your preferences. You can change your preferences at any time by clearing your calcstack_consent cookie (the banner will reappear on your next visit).
Browser settings: Most browsers let you block or delete cookies. Check your browser's help pages for instructions:
4. Impact of disabling cookies
If you disable essential cookies, some features (such as authentication) may not work correctly. Disabling analytics or advertising cookies will not affect the core functionality of CalcStack — you can still use all calculators and tools.
5. Contact
If you have questions about our use of cookies, contact us at hello@flavoureak.co.uk.
For more about how we handle personal data, see our Privacy Policy.