Besides shifts at the bottom of the pile the odd app outside of the top 100 shifting up or down a place in the rankings between 95.5 and 99.5 percent of apps haven't moved since 4am on Friday 29 October.
Based on typical behaviour, 65 to 95 percent of apps move in the US store every hour, making the current status quo a rare event.
Headline halt
"On Wednesday we noticed odd behaviour from every App Store - suddenly they were all stuck. For eight hours 99 percent of apps did not budge.
"We were just about to blog about it and then movement resumed. A fluke, we thought," the site revealed in an entry detailing the slowdown on Friday.
"But then it happened again! The US App Store has been frozen for the last 24 hours!"
The site points out that a similar halt in rankings movement happened almost a year ago to the day, back on November 6 2009.
"Is Apple changing its ranking algorithm? Are the current ranks being pulled from an old cache while Apple tries to fix a problem?" it questions.
[source: appFigures]
