Number of users could jump to 227 million in 2014, from 183 million last year, says eMarketer. But the annual growth rate is expected to drop again.
Fourth-quarter profits jump by 25 percent as laptop, desktop, and smartphone sales all rise.
The app will simply let Nintendo 3DS users tether the device to a smartphone to access the Internet.
Apple is still king of the tablet market with 32.5 percent share, but Samsung keeps grabbing a bigger slice, according to IDC.
Apple took third place last quarter but was hot on the heels of Nokia, according to research firm Strategy Analytics.
Experts caution that the notorious security bug heralds "open season on open source" and will force changes in how open-source code gets vetted as secure.
Microsoft's cutoff of XP support prompted more organizations to upgrade to new computers, but PC shipments still dropped during the first quarter, say research firms IDC and Gartner.
Apple's victory may be short lived, says analyst Michael Walkley, as Android is likely to regain lost ground this quarter based on preorders for new high-end phones.
Apple and Samsung may be top dogs here in the US, but other smartphone makers are taking root around the world in a big way.
The Korean conglomerate posts a loss pegged to currency exchange shifts, but sees smartphone shipments rise 54 percent to 13.2 million units.