Does the iPhone 'App Workout Free' work?

I've been using this app for the past month or two. My question is, does it work? Https://itunes.apple.com/us/app/daily-ab-workout-free/id388882339?mt=8

I use the free version, I do the 5 minute workout every other day. Will I see improvement? Whenever I do this workout my abs burn a lot. So I feel like it's a painful workout, but at the same time I don't know.
Please help me.

Added (1). Sorry, the name of the app is called 'Ab Workout Free'

Added (2). Sorry, the name of the app is called 'Ab Workout Free'

Yes, it does.

5 minutes… Lol

I've wondered the same thing! Any progress since you began?

  • Will the 7 minute workout app make you stronger? I just recently bought the 7 minute workout challenge app, and I read some articles online that say it will help you lose weight, but it is not good for becoming stronger. I didn't know if this was real and I have been doing the workout 2 times a day hoping to be stronger. If this workout isn't good for muscle, what is a good app for the iPhone that have workouts you can do at home to get stronger (without machines)?
  • Why does the App Store want to know my billing information if the app is free? On my iPhone 4s, I try to download an app from the app store, first it'll ask for my password which is normal, and I put it all in correct but then it'll redirect me to my billing information/payment method and ask me to fill it out. I can't remember what my prepaid security number is because I haven't had it in so long so I can't do it. But the apps I try to download are completely free so I don't understand why this would happen. Is there anyway to fix this?
  • What's the best iPhone app food and workout journal? I'm specifically looking for one that adds and subtracts calories based on the activities I'm going and the food I'm eat as well as having a place where I can take and save pictures of my food and progress.
  • What is the best app for workout for guys? What is the best exercise iphone/ipad/ios app for men? I'm looking for more videos, youtube is a mess.