Last year when I hit my heaviest weight I decided to lose weight. I got MyFitnessPal to track my calories and I absolutely love this app. It has such a great database of foods things I thought I would never find are on it and the ability to scan stuff is so good. I have gotten three people so far to start using it and I've got it on my iPhone and my iPad. Along with watching what I eat, calories in and calories burned I started to hit the gym. So then I was looking for an app to track my workouts. I didn't want anything crazy just a simple app that would show which days I worked out and what I did. I tried a few and finally used Epic Workouts, it is as basic as they come but that was what I wanted. The others were too busy for me all I wanted to do what have a quick way to add the excercises I did and see which days I worked out. It does have it's downfalls from being so basic like the fact that it doesn't sync means that I only have the info on the one device. If the device is restored and set up as new or the app is deleted I would have to start from scratch but for now it does what I need. My wife is thinking of getting a Nike fuel band so we might be getting that soon and when we start doing "Insanity" we'll most likely get the tracking app.
MyfitnessPal - Calorie and weight loss tracking
Epic Workout - Very basic workout tracker