A secondary chart tracker and Milestones are two of the latest additions to bijou.fm for iOS. It took quite a bit of work to rebuild the tracking system (and we had our fair share of bugs along the way) to allow tracking for two charts instead of just one. Premium users can now track their Yearly or 6 months chart (or any period of choice) in addition to their Forever chart.
Milestones have been available for some time, and might need some additional tweaking, but I hope you like these additions to bijou.fm.