Four Solve — Privacy Policy

Last updated 7 June 2026

Four Solve ("the App") is published by Prism Data Group ("we", "us", or "our"). This Privacy Policy explains how the App handles information. The short version: we do not collect, store, or share any personal data, and we do not track you.

The data we collect

None. Four Solve does not collect personal information. We have no servers that receive your data, no analytics, no advertising, no third-party trackers, and no user accounts or logins.

Information stored on your device

To make the game work, the App saves a small amount of gameplay information locally on your device only, using the standard iOS storage mechanism (UserDefaults). This includes things like:

Which daily puzzles you have solved, and the number of attempts.
Your current streak, best streak, and total puzzles solved.
High scores for the Quick Games (Speed Round, True/False, Missing Operator).
Your settings, such as whether the daily reminder is enabled.

This information never leaves your device, is never transmitted to us or any third party, and is not associated with your identity. If you delete the App, this information is removed with it.

Notifications

The App offers an optional daily reminder. If you enable it, reminders are scheduled locally on your device by iOS. We do not operate a push-notification server and do not receive any information when a reminder is delivered. You can turn reminders off at any time in the App's settings or in the iOS Settings app.

Purchases (Four Solve Pro)

Four Solve offers an optional auto-renewing subscription, Four Solve Pro. All purchases are processed by Apple through the App Store. We never see or receive your name, payment-card details, or other payment information. Your purchase is handled entirely under Apple's terms and privacy policy. The App asks Apple only whether a valid subscription exists in order to unlock Pro features; no personal data is collected by us in the process.

For information about how Apple handles purchase data, see Apple's Privacy Policy at apple.com/legal/privacy.

Children's privacy

Four Solve is suitable for all ages and is rated 4+. Because the App collects no personal information from anyone, it likewise collects no personal information from children. The App does not contain ads or links that direct children outside the App.

Network use

Four Solve is designed to work without an account and without sending your gameplay data anywhere. The only network activity is the standard, Apple-operated communication required to process App Store purchases and subscriptions.

Changes to this policy

If we make changes to this Privacy Policy, we will update the "Last updated" date above and post the revised policy at this URL. Material changes will be reflected here before they take effect.

Contact us

If you have any questions about this Privacy Policy, email support@prismdatagroup.com.