Best place to practice?

Hi there! I've been using [keybr.com](http://keybr.com) for a while. I'm sitting around 50 WPM with very high accuracy (95+/-). I've been wanting to get above 60 with it, but progess is super slow. I'm practicing 5-10 minutes a day.

I'm comfortable typing without looking. keybr has helped me fix some bad habit keystrokes.

Should I continue on keybr or switch to something else? I've seen people here talking about [https://monkeytype.com/](https://monkeytype.com/) and [https://problemwords.com/](https://problemwords.com/)

When do you use which? Does it matter? Do they have strengths and weaknesses?