You are correct that there are two versions. We started charging for our mobile tracking apps because they require significant resources to build & maintain, but do not provide much revenue via ads (and we have to make money so that we can stay in business and support our free products)! The site is still 100% free and so is our mobile site that can be accessed on your phone's web browser (mobile.sparkpeople.com). If you have the free app, that will likely still function for you, but is no longer updated and has not been for some time. Newer features, like the GPS, are only on the newer paid version of the app.