Amount of time increase too quickly. – 30 Day - Plank Challenge Review

I'm thin and overall fit but using this to tone my core and strengthen my back, as I just turned 40 and need to be doing more. Two days ago I planked for 35 seconds. It was hard for me. Yesterday was my day of rest. Today it jumped to SIXTY SECONDS. That's just stupid. So I deleted it. Glad I didn't pay. I like the concept as it holds you accountable to have a daily thing to do, and I like the 10 second countdown at the end, but the rapidly increasing increments make this app a fail.
Review by lunaruby on 30 Day - Plank Challenge.