Privacy Policy

Protecting your privacy is a first-order concern for Dual N Back. This policy sets out exactly how your data is handled.

1. Data collection and storage

Dual N Back is designed to respect user privacy strictly. We do not collect, store or sell any personal data on external servers.

Everything relating to your training sessions — your working-memory scores, your reaction-time statistics, the highest N-Back level you have reached and your overall progression — is stored exclusively on your device, using Apple's secure technologies (AppStorage / Keychain).

2. In-app purchases and subscriptions

Access to Premium features is handled entirely by Apple through the App Store. Dual N Back never has access to your banking, billing or payment information. Please refer to Apple's privacy policy for any question about how those transactions are processed.

3. Performance analysis (local analytics)

Your progression charts and your attention and fluid-intelligence statistics are computed entirely on your device's processor. No behavioural telemetry and no history of your training sessions is transmitted to third parties or to external analytics tools.

4. Data sharing

Since no data is centralised on any server, no information about you is shared, sold or rented to third parties for marketing, advertising or commercial purposes.