SIMPLER HAIR COLOR review for By the Numbers

Sept. 25, 2020

I researched several apps and found this to be the best, by far. It offers a lot of rich and customizable data that can't be found aside from larger programs that cost much more. On top of that, Fred (who I think is one of the founders) is incredibly responsive and super thorough in his replies. I've reached out to him several times with questions, feedback, etc. and he's gotten back to me in a timely manner with very thorough replies. Incredible product and company!