What provably fair Bitcoin gambling sites work well on a mobile? Are there an Bitcoin-based gambling sites or apps that work on a mobile?

Most of the sites seem to be assuming the player is on a full size display.

If the service isn't considered "provably fair" then I'm not interested.  An example of a provably fair game is one where the host gives the hash of the secret, then a client seed is generated, then after play at some point the secret that was used is revealed.
Provably fair means the player can prove the operator didn't cheat.  With website-based provably fair systems, the generation of a random number and/or client seed is easily to see and monitor.  Unless a mobile app is open source, this same capability is not available. 

So a provably fair website that provides an app doesn't mean the app provides provably fair online gaming as well.   An open source app could be provably fair.

You won't find any of (or at least not many of) these apps on the Google Play store since they are online gambling that is a prohibited app on their service.  But the apps can still be installed from external sources:


Seals With Club poker has a mobile app.
Bitcoin Video Casino has an Android app.