Every day, I check to see how many apps we sold the day before. Every day, I’m surprised.
Week-to-week, we tend to sell about the same number of apps, but the variability day-to-day is higher than I would have expected, and doesn’t seem to follow obvious cycles. Highland rises and falls without much relationship to the day of the week.
Weekend Read has an in-app purchase allowing for an unlimited library. People aren’t buying it just for the weekend.
Stranger still, the sales of Highland and Final Draft seem entwined.
Why did both apps suddenly climb last week? For Highland, it might be because of my [recent blog post](http://johnaugust.com/2014/highland-as-a-bona-fide-screenwriting-app), but why would Final Draft have matched its ascent? (Still, it’s nice to see Highland overtaking Final Draft at times.)
As I said at the beginning: week-to-week, it tends to average out. And a statistician would probably be able to look at the p-value and explain that it all falls within an expected range of variability. But I still wonder why it each day is so different.