Do you know when planner apps will be available for Iphone?

Update:
I just found this on Uservoice:

https://planner.uservoice.com/forums/330525-microsoft-planner-feedback-forum/suggestions/11130210-mobile-app-for-ios-android-and-windows

January 21, 2016:

Thanks for the feedback. We’ve started work on our mobile apps and will working with the folks working on the Groups App to figure out all the right integration points.