In February, there were 224 million monthly active users of mobile apps in the United States, according to research firm Flurry Analytics, making the number of app users a little bit higher than that of PC Internet users, which according to comScore, was 221 million during the same month.

Flurry also reported that app usage is slightly higher during nights and weekends. On average, apps experience 25 percent greater usage on weekends. And during app “primetime” there are about 52 million app users engaging with apps.

Here is more from the Flurry blog:

To get to an audience of that size, you’d need to combine the circulation of the largest 200 weekend newspapers in the U.S. or combine the audiences for the 3 most highly rated primetime TV shows during a good TV week (e.g., The Big Bang Theory). We believe this comparison says a couple of important things about the app audience: first that it has reached critical mass, and second that it is still highly fragmented relative to more traditional forms of media.