Apple seems to be using the Top Charts section of its iPhone App Store to promote its own applications by listing apps like Numbers, Keynote, Pages, iMovie and iTunes U, in higher positions than they would normally rank. When viewed on an iPhone, these apps are showing up intermingled in the Top 20 Free applications on the iPhone, but when viewed from the desktop version of the App Store, they’re either not present at all within the Top 20, or in different positions.
The discrepancy, of course, could be related to a bug in Apple’s App Store ranking algorithm, but it’s a persistent one if that’s the case.
It doesn’t appear to be impacting the relative rankings of most other Top applications besides Apple’s. That is, Facebook Messenger is still at the top of the App Store, followed by newcomer Acapella from PicPlayPost, then YouTube and then Facebook.
However, in the desktop version of the store, a game called Twist is ranked higher than Instagram and Snapchat, while on the iPhone 6s version of the App Store, Twist shows up immediately after those two applications, even when the two charts were viewed at the same time.
Also interesting is the fact that Top Free Charts listings seem to vary from device to device. For example, with another TechCrunch writer, I compared the rankings from an iPhone 5s and an iPhone 6s, both running the latest version of iOS, at the exact same time and found we had two different versions of the App Store’s Top Free Charts on our respective phones.
On the 5s and 6s, iMovie ranked as the No. 3 Free app, but on the 5s Pages was No. 7 while it was No. 6 on the 6s. Numbers was No. 9 on the 5s, but No. 10 on the 6s. iTunes U was No. 11 on the 5s but No. 13 on the 6s.
iPhone 5s (iOS 9.1):
The app store optimization firm Sensor Tower began investigating this odd behavior last week.
According to its initial findings, Apple’s apps seem to show up in random positions on the App Store app on the iPhone, and would sometimes remain listed in the Top Charts even after they were installed on the end user’s device. The company was alerted to this behavior when it noticed that its own ranking data wasn’t matching up with what was appearing in the App Store itself.
Only GarageBand and iTunes U should be ranking in the Top 10, per Sensor Tower’s data, but not Apple’s productivity suite apps or iMovie.
Sensor Tower first tested the App Store on several phones running the latest version of iOS (9.1), and has also now tested this on an iPhone 6 and iPad mini, and encountered the same discrepancies. Plus, they, too, noticed that the issue doesn’t affect the iTunes App Store for iPhone on the desktop.
However, Sensor Tower found that an iPhone running an older version of the iOS software (8.3) didn’t have the same problem as the other devices.
The issue is strange because it can’t always be duplicated. AppFigures CEO Ariel Michaeli, for example, told us that he sees the same Top Charts on his iPhone and desktop.
Without Apple’s official confirmation (no comment has yet to be provided), you can’t officially chalk this up to being Apple’s direct, manual manipulation of the Top Charts rankings. It could be a bug.
That being said, it is worth pointing out that it wouldn’t be the first time Apple’s own apps “magically” appeared in the Top Charts on some devices and not others. For example, a Twitter user in May happened to spot a similar oddity on his iPhone 4 and iPhone 6. When viewing the App Store side-by-side on both devices, Keynote, GarageBand, Numbers and the Apple Store weren’t found on in the iPhone 4’s Top Charts but were on the iPhone 6, he claimed.
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