Cheap fitbit recommendations?

[RavenLG]

Can anyone recommend a cheap (or actual) fitbit recommendation. I have no idea about them. I would like it to track steps, tell me calories burned and I'm hopefully going to start cycling into work soon so if it has any functionality with that it would be good. I have an iPhone for integration if that helps too.
If anyone has any more info on them, i can read online but it still goes over my head.