2. GymPact

Price: Free
If you need monetary motivation, and I assure you I certainly do, this app will give you all you need. It will also cost you if you don’t keep your promise to go to the gym, which may actually be even better motivation. Once you download the app, you go to your gym and check in so that the device knows your gym's GPS location. You then choose how many days you are going to workout and state how much you will pay when you fail to meet your own requirements. Along with the negative repercussions (losing money) when you fail to exercise, you also get a nice reward if you accomplish your goals all week. The money paid by the people who failed to go to the gym gets used to pay you when you stick to your word!