itunesconnect: real download figure? analytics "app units" vs sales & trends' "units"

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In itunesconnect, to check app download figure, App Analytics and Sales & Trends showing two different figure.

e.g. For same certain period,
App Analytics: App Unit = 1729
Sales & Trends: Unit = 1.81K

Which is correct?

I saw some other post (e.g.this) discussing similar issue. But the discussion later didn't come up an answer.

Thanks.

2 Answers

Check the official definitions (from itunesconnect.apple.com) and you will see that all the numbers can be different:

Sales & Trends:

  • Data Guidelines: Data includes all device types. Sales data is the estimated total billed to customers. Proceeds is the estimated amount you’ll receive.

  • Date and Time: Data is shown in UTC or PST. A day includes transactions that happened from 12:00 AM to 11:59 PM for the selected time zone.

App Analytics:

  • Data Guidelines: Data includes devices with iOS 8 or tvOS 9, or later.
  • Date and Time: Days start at 12:00 AM and end at 11:59 PM (UTC).
  • Opt-In: We only show data from users who have agreed to share their diagnostics and usage information with app developers. In the last 30 days, xx% of all users that installed apps agreed to share their data. Diagnostics and usage information may be delayed by up to 72 hours.

Summary

Reporting times are the same if you select the right one (!). App Analytics does not include all sales. If your app is available on older devices, it's not included here. Big question here is: What do you want to achieve? Difference between both numbers in your sample is <5%. For whatever calculations you are doing, just use the same source and don't mix & match.

It's possible that the 3 different reports (including Financial) use different sets of starting and ending timezones, different starting and ending times and dates, and different reporting systems (audited vs. unaudited vs. estimated). Apple says the monthly Financial reports are the most correct.

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