The Google Android Market and Windows Phone 7 Marketplace are the two stores with the highest growth rates in January.
Looking at the growth, we see that the number of paid applications increased by 1,027 in Windows Phone 7 Marketplace while the number free applications increased by 576.
The Google Android Market is known for the large proportion of free applications in the store, and is the only store that has more free than paid applications, with 63% of all applications being free. This trend did not change in favor of paid applications in January, as the number of free applications increased by 16,150 and paid applications increased by 6,847.
Complete report at Distimo.