Is there a mobile app?
No, there is not. Mining requires a lot of computational power unavailable to any of the modern smartphone or tablet yet. Here is why there is no Kryptex app Android and iOS.
Tracking your PC's activity is available directly through web-site as it is optimized for mobile platforms. There is no need in a special app to stay informed of your PC
Get yourself an icon at your main screen with this article: https://www.kryptex.org/en/articles/mobile-statistics-en