Legal
Cookie Policy
Last updated: March 2026 · Sirience LTD
Quick summary
- We use strictly necessary cookies for session management
- We use anonymous analytics cookies via PostHog
- We do NOT set advertising or tracking cookies
- We do NOT sell cookie data to third parties
1. What Are Cookies?
Cookies are small text files stored on your device by your web browser when you visit a website or web app. They allow the app to remember information about your visit, such as your session state. UlCure also uses localStorage and sessionStorage — these are browser-based storage mechanisms that function similarly to cookies but are not sent to the server with each request.
2. How We Use Cookies
We use cookies and browser storage to:
- Keep you logged in to your account between visits
- Save your questionnaire progress locally so you can resume where you left off (stored in localStorage, never sent to our servers until you submit)
- Understand anonymous usage patterns to improve the app (PostHog)
- Track and fix errors (Sentry)
3. Cookie Categories
Strictly Necessary
Always activeThese cookies are essential for the Service to function. They cannot be disabled.
| Cookie | Provider | Purpose | Duration |
|---|---|---|---|
| __session | Firebase / Sirience LTD | Authenticates your session and verifies your subscription status | Session (cleared when browser is closed) |
| ulcure_session_id | Sirience LTD | Anonymous session identifier generated at /start. Links questionnaire answers to your plan. | Session |
Analytics
OptionalAnonymous analytics cookies that help us understand how the app is used. No personal data is collected.
| Cookie | Provider | Purpose | Duration |
|---|---|---|---|
| ph_* | PostHog | Tracks anonymous page views, questionnaire completion rates, and feature usage to improve the Service. All data is aggregated and cannot identify you. | Up to 1 year |
| ph_opt_in_out_* | PostHog | Stores your analytics opt-out preference so we respect it on return visits. | 1 year |
Performance & Error Tracking
Always activeUsed to monitor application errors so we can fix bugs. Error data is scrubbed of personal information.
| Cookie | Provider | Purpose | Duration |
|---|---|---|---|
| sentry-sc | Sentry | Assigns a session identifier to group error reports. Helps us reproduce and fix bugs. No PII is included. | Session |
4. Browser Local Storage and Session Storage
In addition to cookies, UlCure uses the following browser storage:
| Key | Storage | Purpose |
|---|---|---|
| ulcure_progress | localStorage | Saves questionnaire progress so you can resume within 7 days. Cleared after 7 days. |
| ulcure_theme | localStorage | Remembers your dark/light mode preference. |
| ulcure_a2hs | localStorage | Remembers if you dismissed the Add to Home Screen prompt. |
| ulcure_sid | sessionStorage | Anonymous session identifier for the current questionnaire session. Cleared when browser tab is closed. |
5. Managing 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 all cookies (note: this will break the Service)
- Block third-party cookies while allowing first-party cookies
For PostHog analytics specifically, you may opt out of analytics tracking via your account settings. Strictly necessary cookies cannot be disabled as they are required for the Service to work.
6. Changes to This Policy
We may update this Cookie Policy as the Service evolves. The “Last updated” date will reflect any changes. For questions contact contact@ulcure.clinic or see our Privacy Policy.