[phil]

It's great to see those charts. You're conflating iPhone and iPad rankings though.

~10 sales/day won't get you into the US Music top 100 for iPhone since iPhone is a bigger market than iPad. Yet that 80 sales/day number is for iPhone. That's making the extrapolated bit of your chart steeper than it should be.

[chrisa]

Ah, yes! I wanted to point that out. Do you have an idea of what the number for iPad should be?

[phil]

Unfortunately, I don't. I have two paid music apps but like yourself, only have good data for lower portions of the charts. Plus it's tough to pick apart iPad vs iPhone sales for universal apps.

If I had to guess, it's probably about half of iPhone, but don't rely on that!