Use of cookies & localStorage

Updated on 1. June 2026

The cookies are used exclusively to ensure that surveys are delivered correctly from a technical perspective, to prevent multiple displays, and to link responses with sessions or purchases.

You can find more information about cookies, localStorage, and retention periods here.

TypeNameStorage periodDescription
Cookie/localStorageph_user_idpersistentRecognizing a user (anonymized UUID).
Cookie/localStorageph_last_answerpersistentStores the time of the last survey response.
Cookie/localStorageph_survey_completedpersistentPrevents multiple displays of surveys that have already been completed.
Cookie/localStorageph_survey_viewedpersistentPrevents multiple displays of surveys that have already been viewed.
Cookie/localStorageph_order_idspersistentLinks purchases with survey responses.
Cookie/localStorageph_survey_probpersistentControls whether a user is randomly included in a survey’s target group (e.g., 20%).
Cookie/localStorageph_failed_survey_requestspersistentTemporarily stores failed requests so they can be resent later.

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