Use different colors for apps.
A few of my students confuse Calculator Suite with Graphing Calculator on the website. CAS uses a different grid pattern. Classic looks way different.
When I am Proctoring some students it is hard to distinguish which website they are using online.
Texas instruments have a few different color schemes to help teachers easily distinguish calculators. Perhaps you can do something even better?
Can a different color be used on the algebra Menu? All of them are blue/purple now. Perhaps the "Start Calculator Button" and the Algebra Menu in Calculator Suite can be burgandy.