As far as I know, there are only two "platforms" for cell phones: IOS (iPhone) and Android. So, (if you have a cell phone) which one do you have? Android covers a lot of different "names", but I'm just interested in which platform you have. My whole family has always had iPhones and I was a holdout with my Android (Galaxy) for a long time. The main reason I switched was because Becky Higgins came out with an app called Project Life and it was only available on iPhone/iPad, etc. She eventually came out with the app for Android, but it was quite awhile.