I purchased ChairYoga,thinking it would be a good supplement to my usual exercise routine. It starts with a whole bunch of questions to determine a starting point. I quickly learned it was way too easy, but I couldn’t find a way to adjust my level. Then, after about 5 days I started to have issues when playing the videos for the day. The buttons to start things playing got huge, while the video portion got very small. I hadn’t touched anything to make this happen and couldn’t find any way to get it back to a more usable format. I tried turning my iPad off and back on again, with no effect. I reached out to ChairYoga developer, with no response. I finally deleted and reinstalled ChairYoga , only to have the problem reoccur after a day. So far, ChairYoga has provided lots of frustration, a big waste of money, and not much of a workout.