They do! For the iphone the app is called Gastracker. Just do a search in the app store for that name. You will see that the app is owned by Fuelly, LLC. Also, before that, I used http://m.fuelly.com for years. It is formated for a cell phone and works great for getting your data entered quickly while at the gas station. Then you can visit the full site from your computer to see the fancy stuff.