A Nielsen study (via TechCrunch) reveals that while we all spend much longer using mobile apps than we did two years ago, and we may have many more apps installed on our phones, the average number of apps we actually interact with in any given month hasn’t changed nearly as much.

While time spent using mobile apps climbed from 18h 18m in 2011 to 30h 15m by the end of last year, the total number of apps actually used only increased from 23.3 to 26.8. So we’re spending more time using pretty much the same number of apps … 

The biggest jump seen was in photography apps, where monthly usage time more than doubled in the space of a year. Entertainment and news also saw substantial increases.

Unsurprisingly, the younger you are, the more time you’re likely to spend using apps.

We’d also hazard a guess that techier folks who make up our readership use more apps than average, but let’s see. Take the poll to tell us roughly how many apps you use in a typical month, and let us know in comments any changes you’ve noticed in your own app use over the years.