@Joann Huang , thank you for your response.
The add custom algorithm doesn't work. There is a turn/move limit in that feature, so if I enter a typical scramble of like 20+ moves, it says it's too long. Part of this may also be because there is no way for me to enter 180 degree turns (e.g. U2, which is registered as U U). I believe slice moves are also registered as two moves (e.g. M is registered as L' R), unless I manually enter the slice move by clicking the slice button, which then puts the cube I am using for input out of sync with the virtual cube on screen.
What would be really great is if I could just cut and paste a scramble string instead of having to enter it by buttons or by using the bluetooth cube. But entering the scramble with the cube would be okay, I suppose, if it worked (didn't get the scramble too long error).
But, even then, I don't like having to Add an Algorithm library just to enter my own scramble. It's very inconvenient, and takes me out of the timer mode I want to practice in. Web apps like Cubeast and cstimer allow manual scramble entry right in the timer mode.