While CP Legacy currently supports mobile devices and tablets to play using the browser, we do not actively maintain them as we are busy working on features that suit players who are playing on desktops or laptops. As CP Legacy continues to add new features to the game, performance will be impacted.
There is very little you can do to increase performance in relation to playing on mobile or tablets. We strongly urge you to play the game on desktop/laptop for the full experience.
There are currently no plans for a mobile/tablet app in the near future.