Need more data to demonstrate the power of mobile? Well, 69% percent of U.S. online adults now use mobile in-store -- mainly to look up prices, product information, promotions, or customer reviews -- according to fresh Forrester findings.

Mobile messaging apps haven't quite taken over the world -- but they're getting there. By 2019, in fact, more than a quarter of the world's population will be using mobile messaging apps, per a new prediction from eMarketer.

The 100 most popular apps keep hogging more and more of consumers' time, according to fresh finding from Opera Mediaworks. In the first quarter of the year, people spent an average of 30 minutes with top apps; 33.5 minutes in the second quarter; and, so far, they are spending an average of 36.9 minutes in the third quarter.

Used intelligently, push notifications are believed to increase retention rates among app users. And, as new research from Localytics suggests, more developers are wising up to that fact.

Worldwide, smartphone profits reached $9.4 billion during the third quarter of the year, according to fresh findings from Strategy Analytics. Remarkably, Apple captured a record 91% share of those profits, or about $8.6 billion.

While desktop ads have historically had higher on-target percentages for reaching their intended audience than mobile, advertisers have made significant strides in closing the gap in recent years.

As CEO Mark Zuckerberg said on a recent earnings call: "We're putting video first." Last month, the social giant even launched a major ad campaign for Facebook Live.

Twitter can't seem to please anyone, these days. After suspending the accounts of several prominent members of the "alt-right," the social giant mistakenly ran an ad sponsored by a white supremacist group this week. Admitting that the ad violated Twitter's own policies, CEO Jack Dorsey took the blame for the blunder, on Thursday.

Of course, consumers hate crashing apps. But how big a problem are crashes, really, and what's the likelihood that they'll drive users away?

For every 10 apps that users install on their phones, more than three are ultimately uninstalled, new research finds. How do developers avoid finding themselves on the wrong end of that statistic?