Is wooty SDA Timer allowed for Speedrunning? I'm new on Speedrun.com and... yeah.

I'm not familiar with that timer, but as long as it works it's fine.

Timers simplify some timing things, but they are hardly required, you can speedrun with any timer or no timer at all. All that matters is that if you don't use a timer you have a way of accurately getting the final time of the run afterwards (like frame counting it).

Dude just use a stopwatch!

Use whatever timer you want. Your video is what really matters for timing.