The Top Grossing chart ranks apps by total revenue — combining paid downloads and in-app purchases — making it the best measure of which apps are actually making money. The United States is the world's largest app market, and these rankings are closely watched as an early signal of global trends. IFIT Workouts made the biggest jump, climbing from #23 to #21; Google Health (Fitbit) holds a steady position at #1, where it has charted for 130 days.
