Individual apps can be protected with the jailbreak tweak Asos, recently updated for iOS 8. Asos prevents an app from running without authentication, making it possible to add a passcode to apps or use Touch ID for access. Asos also protects its own settings page, and can do this with Touch ID.
Once installed, settings can be configured to determine when an app prompts for authentication. Apps can request a passcode or Touch ID every time they run, once after reboot, or at timed intervals. Each app installed on iOS 8 can be secured or left unprotected by Asos, based on user preferences.
Beyond the passcode and Touch ID integration, Asos will blur app switcher cards to prevent unauthorized users from seeing a preview of app content. This feature is already found in some apps, such as those with sensitive banking data.Asos is available from the BigBoss repository on Cydia for $0.99. To start customizing iOS, click here for instructions on how to jailbreak iOS 8.1 with Pangu. Those with older firmware can check here for details on jailbreaking iOS 7.0 with evasi0n 7. The previous release of Pangu will jailbreak devices running iOS 7.1. Find out how to purchase and install Cydia tweaks with this guide.