US mobile commerce sales (including travel) surged 91.4% in 2011, to reach $6.7 billion, according to eMarketer. Continued strong growth will boost sales to $31 billion in 2015. 

More smartphone users, greater consumer comfort with mobile shopping and an increasing number of retailers launching mobile sites and apps will all play a part in propelling m-commerce sales. This will help US m-commerce sales grow at a compound annual rate of 55% from 2010 to 2015, including 73.1% growth expected this year.

US M-Commerce sales, 2010-2015:
- 2010: US$3.5 billion (+118.8%)
- 2011: US$6.7 billion (+91.4%)
- 2012: US$11.6 billion (+73.1%)
- 2013: US$17.2 billion (+48.3%)
- 2014: US$23.7 billion (+37.8%)
- 2015: US$31.0 billion (+30.8%)

In 2011 mobile shopping became synonymous with smartphone shopping. The percentage of mobile shoppers who were smartphone users jumped to 93%, from 75% in 2010. As people trade in their feature phones for smartphones they will naturally take advantage of their devices' powerful capabilities for doing a range of mobile activities, including shopping and buying.

US mobile shoppers, 2010-2015:
- 2010: 39.5 million (of which 75.2% are smartphone shoppers)
- 2011: 55.9 million (of which 93.1% are smartphone shoppers) 
- 2012: 72.8 million (of which 94.3% are smartphone shoppers)
- 2013: 87.6 million (of which 95.1% are smartphone shoppers)
- 2014: 99.4 million (of which 95.3% are smartphone shoppers)
- 2015: 111.7 million (of which 95.9% are smartphone shoppers)

Completing a purchase via mobile is less popular, with only 26.8 million mobile users estimated to have done so in 2011, but that number too will rise quickly, to 61.8 million in 2015.

eMarketer indicated that purchases from mobile phones still account for a tiny share of total ecommerce sales. However, in some retail categories like flash sales and tickets, retailers report a much higher share of sales coming from mobile users.