Facebook’s iPhone Page Manager app allows admins to promote and schedule Page updates.
Promoted Posts Via Mobile
You can now promote posts simply by touching “Promote” at the bottom right of your most recent updates. Once you select “Promote”, you’ll be able to purchase various different levels of reach simply moving a slider (as shown below).
For all posts (promoted or not) you can view post-level Insights data (reach, engaged users, comments, likes and shares).
The iPhone app also allows page admissions to schedule updates by touching the clock icon and then the desired date and time using the scroll wheel (as shown below).