Related Clues:

• Yik Yak and Fun Run, for two
• Subjects of frequent updates
• iPhone add-ins
• "__ on!": "Dinner!"
• iTunes Store purchases
• 2 Down et al
• Phone fun
• Google Play buys
• Mobile device diversions
• Mobile downloads
• 49 Down accessories
• "Killer" software items
• Developers work on them
• "Killer" PC programs
• Mobile ___