The latest comScore data shows consistent growth in US smartphone penetration. The rate is now 58.4% of adult consumers who own phones. This is up from 20% only three years ago. The rate of growth remains a remarkable 1.2% per month. That’s 700,000 new-to-smartphone users every week. The historic average over 3 years has been 1.07%/month This after having crossed over 50% on schedule in August 2012. There appears to be no slowing.
The next milestone I have pencilled in is the 80% mark which I extrapolate to be achieved by October 2014. 80% could be considered “saturation” which would signify a rapid slowing of new user addition. However, that might still not happen until 100%, depending on the availability (or lack thereof) of non-smartphones to buy.