Arment’s app, Instapaper, has “almost always between #2 and #5 in the paid News categories on iPhone and iPad,” so he gets to see trends that many others don’t. Among those trends is when the iPhone, iPod touch and iPad get sales spikes. Since his app ranking is consistent, variations and spikes in app sales can largely be attributed to spikes in actual device sales.
Here, Arment lays out a few dates for when his app saw increased sales, and he explains why these dates are particularly significant:
- November 11, the day after a major new version that got a lot of press: 1.96 times the average.
- December 12, with a major New York Times feature: 2.86 times the average.
- December 25, Christmas day: 2.48 times the average, with a gradual decline to the average by around January 6. (My rank was nearly constant during this time.)
There are a few plausible explanations, according to the developer:
- Very few Verizon iPhones have been sold. I don’t think this is likely.
- Verizon iPhone owners are buying very few apps relative to other iPhone owners. This also seems unlikely.
- Most Verizon iPhones have been sold to existing iPhone or iPod Touch owners, who therefore already own most or all of the apps they want. This seems like the most likely explanation by far.
Arment also feels that sales of the CDMA iPhone will be strong, but steady over the course of time. Early termination fees, partial subsidies and Apple’s launch cycle might have deterred many users from buying the Verizon iPhone 4 this month, but that doesn’t exactly mean that it’s going to be a failure.
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