You probably saw this readwrtieweb article about a replacement homescreen making $750k in 3 weeks. It is interesting from several points in that now is the time to enter the replacement homescreen category, price points, etc.
Everyone has seen the GRE and like study apps at above $20 not selling with the typical application generating about less 100 downloads over a one year period for about the same amount of develop time as a replacement homescreen. Whereas SBP Shell hit 50,000 downloads in 3 weeks at $14.95. In fact recently I turned down an interview invite from a Chicago startup because they had their andorid application priced above $79.
But its not the price-point alone as replacement homescreen is big market as the percentage of android device users that potentially could want the product. Student testing products run into some market limiters such as student limited resources, did they buy the android device, and limited budget to spend on testing materials. Which means in the student testing materials applications they should not be pricing premium but pricing at $2.99 as that will drive competitors out of the market while increasing the market share..
What might be a closer comparison is games in that you could price a complex 2d or 3d game at $14.95 and with some heavy duty marketing each the same revenue results. The key here is that he company that created SPB Shell did this in a year and thus had a full year to stoke the marketing fires.
Thus, I am revamping and relaunching the Zyle replacement HomeScreen under a new name and new focus. You will gin to see screen-shots and video. The product name will be Zoquious, probably.