This is an excellent app! The best of its kind Ive seen! As awesome as it is (and super easy to use), the best thing about it is not its top notch quality! Instead it is the 5x5 workout program itself! Im close to 40 and Ive been working out since I was a teenager. Ive tried all kinds of weight training and bodybuilding programs and none of them can hold a candle to the StrongLifts 5x5 workout regimen. Ive only used it for a month and already Im close to my prime, back when I was 20! I cant recommend it enough! Thank you Mehdi!