Not gradual enough

I love the concept and love the 100 pushup app, but for me...a beginner who could barely do 5 sit-up/crunches I feel it pushed way to hard on the first day. First day pushed me to 65 sit-up/crunches and up to 81 on day 2. Strained me way too hard. I like the hundred push-up cause it got me to 80 pushups in 5 weeks but 65 on the first day was way to much for a beginner and they dont have a 100 sit-up app :( very disappointed because I have to trash the app. It forced my body too hard and threw my neck and back out. And yes i was doing it "good form" asked my fitness trainer friend to make sure. No way I can Strain that hard so early.

Disapponted teacher about Two Hundred Situps: Strengthen Your Core