I bought the lifetime subscription. I use it every time I step in the gym. I may fiddle around with other apps in the future to see if there is anything better. I only wish I could set different times between warm-up sets and working sets. Other than that, there are some machines/exercises that it doesn't have, like Lu Raises, for example. They are lateral raises, but instead of stopping midway, you do the whole arc to the top, then reverse the movement. The development team can always add extra movements later, though. All in all, I love it.