The US firm does not reveal exactly how much of its own earnings come from the App Store. Its results for the year to September 2016 showed that its services division generated net sales of $24.3b (NZ$34.5b); this includes income from apps, music, licensing and Apple Care policies.
The most-downloaded app on January 1 this year was Super Mario Run, one of Nintendo's first forays into smartphone gaming, which is free to use but costs £7.99 to unlock fully.
Mario's latest outing has recently replaced Pokemon Go, another game in the Nintendo stable, at the top of the charts.
Even apps that customers download for free can produce income through one-off purchases and regular subscriptions. Apple said subscriptions to services such as Netflix, Tinder and Spotify generated payments worth $2.7b (NZ$3.8b) last year, an increase of 74pc on a year ago.
Apple has come under scrutiny this week for pulling the New York Times app from the store in China, after a request from the Chinese authorities.
The company's iBooks and iTunes Movies stores have been blocked in the country since April, just months after they were launched, as Beijing clamps down on any online services seen to threaten national security.