Cookie Policy

This is an English translation provided for convenience. In case of any discrepancy, the Turkish version at netzeroes.com.tr/cerez-politikasi is the authoritative and legally binding text.

1. What Are Cookies and Similar Technologies?

Cookies are small text files saved to your browser when you visit a website. In addition to classic cookies, NetZero E.S. also uses browser local storage (localStorage) mechanisms that serve the same function. In this policy the term "cookie" covers both technologies unless stated otherwise.

2. Legal Basis and Consent

The use of non-essential cookie/storage mechanisms is based on the consent requirement of the EU ePrivacy Directive and the GDPR, and in Türkiye on the explicit-consent principle of the KVKK. The Platform may use technically essential cookies (required for the service to function) without seeking user approval; non-essential (functional) cookies are activated only when you give explicit consent via the cookie consent bar. Your consent is stored in your browser under the key nz_cerez_tercihi and remains valid until you change it.

3. Types of Cookies/Storage Used on the Platform

Name	Type	Purpose	Retention Period
Firebase Authentication session token	Essential	Keeping the session open, authentication.	For the duration of the session / until you sign out
nz_dil	Functional	Remembers your chosen interface language (TR/EN/DE).	Persistent (until you change it)
nz_cerez_tercihi	Essential	Remembers your cookie consent choice and prevents the banner from being shown again.	Persistent (until you change it)
nz_onboarding_tamamlandi_*	Functional	Remembers that you completed the welcome wizard.	Persistent
nz_cihaz_kimligi	Essential	Identifies your device for session management; enables the “sign out of all devices” and session list features.	Persistent (until you delete it)
nz_oturum_kaydi	Essential	Prevents the session record from being sent to the server more often than necessary.	Persistent (refreshed at short intervals)
nz_kabuk_kullanici	Functional	Stores a summary of your name and role so the menu appears instantly when moving between pages.	Until you sign out
nz_taslak_*	Functional	Stores unfinished calculation forms as drafts.	Until saved or until you sign out
nz_canli_katsayilar_onbellek_v2	Functional	Caches current emission factors so pages open quickly.	Persistent (refreshed regularly)
nz_oncelikli_moduller_*, nz_demo_hesaplama_sayaci, nz_lead_popup_gosterildi, nz-pwa-banner-*	Functional	Remembers your module order preference and whether information pop-ups have already been shown to you.	Persistent
Offline cache (Service Worker)	Functional	Keeps a copy of page files on your device so pages can open without a connection; contains no personal data.	Until the version is updated

The Platform does not use third-party advertising/tracking cookies.

4. Third-Party Service Providers

Google Firebase is used for authentication and database infrastructure, and Shopier for payment processing. These providers may use limited technical cookies under their own privacy and cookie policies; those cookies are not controlled directly by NetZero E.S. The Platform does not use third-party advertising/tracking (retargeting) cookies or analytics tracking tools (such as Google Analytics).

Cloudflare is used for content delivery and attack protection; Cloudflare may set short-lived technical cookies solely for security purposes. Visitor counts are not kept with a third-party analytics tool; they are kept on the Platform's own infrastructure, without cookies and as daily totals that cannot be linked to an individual. Details are set out in Section 3 of the Privacy Policy.

5. Managing Your Cookie Preferences

On your first visit you can accept or reject non-essential cookies via the cookie consent bar that appears at the bottom of the screen. You can reset your choice at any time by clearing local storage data (localStorage) in your browser settings — in that case the cookie consent bar will appear again on your next visit. Most browsers also offer settings that let you block or delete cookies; however, blocking essential cookies may prevent some core Platform functions (e.g. staying signed in) from working.

6. Consequences of Rejecting Non-Essential Cookies

Rejecting non-essential (functional) cookies DOES NOT block the Platform's core calculation functions — the Platform continues to work fully. You may, however, notice the following concrete differences: your chosen interface language (nz_dil) will not be remembered between visits and will revert to the default language (Turkish); the fact that you previously completed the welcome wizard (onboarding) may not be remembered and the wizard may appear again. Essential cookies (keeping the session open, your cookie preference itself) continue to be used in all cases, because without them the Platform cannot function in terms of basic security and functionality.

7. Changes to This Policy

This Cookie Policy may be updated from time to time in line with technical changes to the Platform or regulatory updates. The current policy is always published on this page.