Consumers spent six times as much time in retailer apps in December compared to a year earlier, showing that shopping and commerce is finally beginning to take off on mobile platforms.

Flurry, the mobile analytics startup, looked at about 1,800 iOS and Android apps from December 2011 to December of last year. They also broke it down into five other categories including Retailer Apps, Price Comparison, Purchase Assistant, Online Marketplace and Daily Deals.

Time spent in apps overall grew by 132 percent year-over-year, so as you can see above, basically every category except for daily deals outpaced growth in the rest of the ecosystem.

Retailer apps like ones directly from Walmart, Target, Macy’s, Victoria’s Secret, Gap and Saks 5th Avenue, grew the most in terms of time spent. Time spent in ‘Price Comparison’ apps like eBay’s RedLaser and Grocery IQ grew by 247 percent year over year. At the same…