Yes, Knack is designed to work well with phones and mobile devices.
Knack apps are responsive, which means they will resize depending on the device being used to view the app. So an app being viewed on a mobile device will respond accordingly to the size of the device.
While Knack apps can’t be downloaded from an app store, they can be accessed via the web browser on any sized device.
Knack apps are also built to leverage mobile features. Including image uploads using your mobile camera, geolocation, and signatures on a touchscreen.
Read more about using Knack on mobile devices here.