I was trying your math app and reached a point where the app said I must go premium. I'm not sure I can afford this but I clicked on subscribe to see the cost. My computer chugged away with a circle of dots for a while and said loading, then quit. What did it load and where did it put it? My pool has been open less than a week and I can't bring the program up to today's information, it looks like I must subscribe to be able to track anything, and I don't know how to subscribe. I know little about computers and much less about pools so baby steps in any answers, please.