Helpful

It helps remind you to take a break sometimes and keeps you from getting burnt out from studying or whatever your task at hand may be.
Bought it to link it with the phone app, which is nice since I have the large clock on my phone off to the side though I control the time settings on my laptop.
Is a bit annoying to be asked to write a review often, despite paying for it (only because it was on sale.)

Would recommend it, but keep the free trial unless there is a sale or you truly find it helpful.

Sly-syd about Be Focused Pro - Focus Timer, v1.3