App Store Connect Analytics API (ONGOING): duplicate instances causing permanent data gaps

We've been pulling daily download reports (First-time downloads + Redownloads) via ONGOING requests and noticed random missing days in our data — in April alone, we were missing the 11th, 14th, 23rd, and 27th.

After debugging, here's what's actually happening:

  • Apple sometimes publishes two consecutive ONGOING instances with identical content (same processingDate → same Date in the CSV)
  • The day after a duplicate, the CSV skips a date entirely — that data is simply never published
  • Those missing days are gone forever. There's no way to recover them via API

Does this happen to anyone else? Do you know if there is a way to recover missing data?

The issue still persist with May

Out of the first 7 days, 3 reports are missing

App Store Connect Analytics API (ONGOING): duplicate instances causing permanent data gaps
 
 
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