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On most days, Twitter is now generating the majority of its revenue from ads shown to its users on mobile gadgets, rather than from ads on Twitter.com, company executives said. One key reason: People who see a Twitter ad on their phones are more likely to click or interact with it in some way, which is how Twitter gets paid for advertisements.

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.

Angry Birds is migrating to China. Rovio, the Finnish gaming company behind Angry Birds has opened its Shanghai office and outlined plans for activity parks and stores across China, one of its biggest markets.

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.

It's probably not the kind of thing voters will use to choose the leader of the free world.
But the Web was taking no shortage of presidential potshots Wednesday over Republican candidate Mitt Romney's new mobile app, which embarrassingly misspelled "America." Yes, Internet. Welcome to AMERCIA.

The new app is similar to Instagram, the photo-sharing app Facebook is in the process of buying for $1 billion. The acquisition, however, has not yet been completed, and Instagram's employees did not work on the Facebook app. Facebook has said it expects the Instagram app to close sometime this year.

Zynga is trying to provide some answers for its controversial acquisition of "Draw Something," a mobile game that was released only six weeks earlier and has since lost popularity.

Made-in-China mobile devices are clicked on every continent. The same isn't true of Chinese mobile software, which is mostly aimed at domestic users. One company that reckons it has a product that crosses continents is UCWeb, a developer of mobile browsers that has gone head-to-head with Tencent's mobile platform in China.

Facebook's $1 billion acquisition of photo-sharing start-up Instagram has shifted the spotlight to the newest phenomena in mobile apps: uploading personal videos from smartphones.