Probably an iPhone 5 or better, iOS 9 at LEAST. Also required, an internet connection to download, and 0.99 cents to purchase forever. Why do we charge, you say? Well, mostly because we have poured a lot of work and effort into this, but we don’t want to flood people with ads, nor to use their personal information and sell it. Keep in mind, it’s less than what you would pay for a candy bar.