Privacy Notice

1. Who is responsible for your data

Edward Fritzell, trading as QuantSolve, is the data controller for personal data processed to operate QuantSolve. This notice explains our handling of data relating to accounts, interview preparation, service use and support. Paddle independently handles payment-related personal data as our Merchant of Record; see Paddle's Privacy Notice for its processing.

2. Data we collect and why

• Account and authentication information: email address, user identifier, optional display name, login credentials handled by our authentication provider, and session information. We use these to create and secure your account, authenticate you and send account confirmation or password-reset messages. The legal bases are performance of our contract and legitimate interests in account security.
• Learning and practice data: submitted answers, attempt results and timestamps, bookmarks, lesson completion, method-recognition attempts, generated-question history and mental math sessions. We use these to deliver practice, save progress, calculate statistics and recommend relevant material. The legal basis is performance of our contract.
• Subscription information: plan, subscription status, billing-period dates and Paddle customer or transaction references. We use these to provide paid access, manage subscriptions and reconcile orders. The legal bases are performance of our contract and applicable legal obligations. We do not store full payment-card details.
• Support and issue reports: messages, question references, report details and account information needed to investigate a request. We use these to respond, correct content and resolve service problems. The legal bases are performance of our contract and legitimate interests in maintaining the service.
• Technical and diagnostic information: IP address, browser or device information, request and error logs, and usage events needed for service operation. We use these for security, fraud prevention, troubleshooting and reliability. The legal basis is our legitimate interest in operating a safe, reliable service, subject to your rights.

Where optional analytics or marketing requires consent, we will request consent before that processing begins. Essential account messages are not marketing.

3. Who we share data with

We share only data appropriate to the purpose with:

• Service providers that operate hosting, account authentication, data storage, transactional email, diagnostics and support tooling, including Lovable Cloud and its infrastructure providers. They process data under appropriate agreements and access restrictions.
• Paddle, our Merchant of Record, for product sales, subscription management, payments, tax compliance, invoicing, fraud prevention and refunds.
• Professional advisers, such as legal and accounting advisers, where needed to meet our obligations or protect legitimate interests.
• Authorities where disclosure is legally required, or where necessary and lawful to protect rights, safety or security.

We do not sell your personal data. Linking to a job listing or another website takes you to a separate service governed by its own privacy notice.

4. Retention and deletion

We retain account and saved learning data for as long as your account is maintained and the data is needed to provide the service. Guest practice data is stored locally in your browser until you clear that storage. Support and diagnostic data is kept for the period needed to resolve issues, maintain security and establish or defend legal claims.

Order-related records may be retained for periods required by applicable accounting, tax or other laws. When personal data is no longer necessary, we delete or anonymise it. Backup copies may remain until normal backup rotation completes and are not used for routine service purposes. You may request deletion; we will explain any legal requirement that prevents immediate deletion of particular records.

5. International transfers

Our service providers may process personal data outside your country, including outside the European Economic Area or the United Kingdom. Where UK or EEA data protection law applies, transfers must be covered by appropriate safeguards, such as an adequacy decision, the European Commission's Standard Contractual Clauses and, where required, the UK Addendum or International Data Transfer Agreement, together with any necessary supplementary measures. You may request information about the safeguards relevant to your data.

6. Your rights

Depending on the law applicable to you, you may request access to your personal data, correction of inaccurate data, erasure, restriction of processing, and portability. You may object to processing based on legitimate interests and to direct marketing, and withdraw consent at any time without affecting the lawfulness of earlier consent-based processing.

Where GDPR or UK GDPR applies, we will respond to rights requests within one month. If a lawful extension is necessary because of complexity or the number of requests, we will notify you within that month and explain why. We may need to verify your identity without collecting excessive information. You also have the right to complain to your local data protection supervisory authority; in Sweden this is Integritetsskyddsmyndigheten (IMY). These rights may be subject to lawful exceptions.

7. Security

We use appropriate technical and organisational measures designed to protect personal data, including encrypted connections, authentication, access controls and restrictions on access to saved user records. No system can guarantee absolute security. Keep your password confidential and notify us if you suspect unauthorised account activity.

8. Cookies and browser storage

QuantSolve uses essential session information and browser storage to keep you signed in, save guest progress and bookmarks, and remember interface preferences. A functional sidebar-preference cookie may remember whether the sidebar is open or closed. These functions support the service you request; blocking them may prevent sign-in or saved progress from working correctly.

No optional advertising or third-party marketing analytics cookies are configured in the current application. If we add optional analytics or marketing cookies, we will explain them and obtain consent where required, with a way to change your choice. Paddle checkout may use its own cookies, governed by Paddle's notices and preferences.

You can delete or block cookies through your browser settings and clear site storage to remove locally saved guest data. Clearing storage may sign you out and remove unsynchronised progress.

9. Contact and updates

For a privacy enquiry concerning a purchase, visit paddle.net or use the support link in your receipt and ask for your enquiry to be routed to Edward Fritzell, the QuantSolve seller. Account holders may also use the in-app "Report an issue" control to send a seller-directed request. Please identify it as a privacy request and do not include passwords or full card details. Requests about Paddle's own processing should be sent to Paddle through its Privacy Notice.

We may update this notice to reflect service or legal changes. The effective date above identifies the current version; material changes will be communicated where required.