https://techcrunch.com/2020/02/03/iowa-caucus-app-failed/

A smartphone app tasked with reporting the results of the Iowa caucus has crashed, delaying the result of the first major count in nominating a Democratic candidate to run for the U.S. presidency.

The result of the Iowa caucus was due to be transmitted by smartphone apps from delegates across the state on Monday, but a “quality control” issue was detected shortly before the result was expected.