Cell Phone App | featured news

Over the weekend, Facebook added a stalkerish feature called "Find Friends Nearby" to its mobile website; on Monday, it was gone. "Find Friends Nearby" let users of iOS and Android devices locate BFFs — and perhaps nBFFs (never BFFS) — who were within range.

Tuomas Erikoinen, the man who drew the hit "Angry Birds" app, doesn't really resent his creation. He's just bored with it. He sees the game's grumpy, ball-shaped, wingless birds everywhere he goes, their furrowed brows staring him down. Here in Finland's capital, where "Angry Birds" began, Erikoinen's drawings have been turned into T-shirts, "plushie" stuffed animals and two brands of soft drinks -- Tropic and Paradise.

Poor Instagram users. First, their beloved photo-sharing application moves from iPhone-only exclusivity to the Android phone masses. A week later, Facebook swallows up the tiny startup behind the app for $1 billion. The purchase sparked worries that Facebook might shutter Instagram or change it for the worse by harvesting their personal information or shoving ads into their carefully curated photo streams.

Can a two-year-old photo sharing app really be worth $1bn? It would buy you some some 2,100 Rolls Royce Phantoms. Or 200 million mosquito nets to fight malaria. Or the whole of the New York Times company (with $50m change to spare). If you are Microsoft, it buys you some 800 AOL patents to fight the next patent war.

Microsoft, struggling to dent the dominance of Apple and Google in the smartphone market, is aggressively courting app developers for its Windows Phone.

Here are six easy, inexpensive DIY solutions for creating apps for iOS and Android devices.

Ranked No. 16 in the iTunes App Store's "Top Grossing Apps" is an app called "Girl With Clothes." Released March 13, we have some inkling about why this app is such an overnight success. It's probably the monster $160 price tag -- though the vague promise of "intense sexual content" probably doesn't hurt, either.

Instagram, the iPhone photo-sharing app that turns almost anyone into an artful photographer, is growing at an astonishing rate.

Marketers are tracking smartphone users through "apps" - games and other software on their phones. Some apps collect information including location, unique serial-number-like identifiers for the phone, and personal details such as age and sex.