Ive been using this app for while now and Ive seen a huge difference in my stomach, Ive noticed it had gotten tighter, even my family and friends have mentioned it to me. I love this app very much , all the other ones I dont feel the burn , but this one I feel it working , and I love it! This is great app , I recommend to anyone trying to lose their belly fat , and or are trying to get abs. My brother uses this also, and he had gotten abs, and we will both continue using this app and working out! Thank you for whoever made this because they did a superior job!:)