I've used this for an app I've build for fun (to check out Swift).

It ranks bad for both Yoga and Meditation, yet one can't use the app for anything else. I could, theoretically, remove these keywords, but what would I replace them with? I have no idea, and your tool doesn't help me.

I'd say it is more valuable to rank for a strongly-related keyword anywhere than to rank high for a weakly-related keyword. I.e. if my Yoga and Meditation app ranked #1 for Airplane, it would be completely useless :-)

Otherwise, I enjoyed using the tool. Nice flow through the process and good visualisations in the end.