This comes at quite a surprise, but daily US iPhone app downloads have dropped, considerably, with a 30-percent month-over-month drop. This is up from the 6.35 million in February to just 4.45 million in March, according to mobile marketing firm Fiksu.

Fiksu also says that it was the second straight month of decline in the course of their tracking, with a drop in January to February, but no where near as severe. January saw downloads topping 6.79 million, so a drop to 6.35 million is less than 10-percent. But a 30-percent drop the month after? That's something worth noting.

Fiksu also states that the drop is most likely due to two trends: first, the iPhone 4S is no longer a new device, so owners may be less concerned with downloading new apps. And secondly, Apple has decided to crack down on third-party marketers using bots to download apps and inflate chart rankings. This would make sense as with fewer bots, app traffic may now be coming down from its inflated numbers, down to reality.