Hidden nonrefundable charges that don't show up anywhere. If I subscribe to an app through the Google play store, I expect that subscription to be managed through Google play. Simple doesn't do that, you have to log in through their site. They hide charges this way because they provide no refunds. The app isn't even useful, it just tells you not to eat. Given this uselessness and their sketchy business practices I would encourage everyone to find a different app that is transparent and honest