Smart Phones and Electronic Surveillance

How Smartphone Apps Spy On You

December 17, 2010

MarketWatch - WSJ's Julia Angwin explains to Simon Constable how smartphone apps collect and broadcast data about your habits. Many don't have privacy policies and there isn't much you can do about it.

Your Apps Are Watching You (Excerpts)

December 18, 2010

Wall Street Journal - Few devices know more personal details about people than the smartphones in their pockets: phone numbers, current location, often the owner's real name—even a unique ID number that can never be changed or turned off.

These phones don't keep secrets. They are sharing this personal data widely and regularly, a Wall Street Journal investigation has found.

An examination of 101 popular smartphone "apps"—games and other software applications for iPhone and Android phones—showed that 56 transmitted the phone's unique device ID to other companies without users' awareness or consent. Forty-seven apps transmitted the phone's location in some way. Five sent age, gender and other personal details to outsiders.

The findings reveal the intrusive effort by online-tracking companies to gather personal data about people in order to flesh out detailed dossiers on them.

Among the apps tested, the iPhone apps transmitted more data than the apps on phones using Google Inc.'s Android operating system. Because of the test's size, it's not known if the pattern holds among the hundreds of thousands of apps available.

Apps sharing the most information included TextPlus 4, a popular iPhone app for text messaging. It sent the phone's unique ID number to eight ad companies and the phone's zip code, along with the user's age and gender, to two of them.

Both the Android and iPhone versions of Pandora, a popular music app, sent age, gender, location and phone identifiers to various ad networks. iPhone and Android versions of a game called Paper Toss—players try to throw paper wads into a trash can—each sent the phone's ID number to at least five ad companies. Grindr, an iPhone app for meeting gay men, sent gender, location and phone ID to three ad companies.

"In the world of mobile, there is no anonymity," says Michael Becker of the Mobile Marketing Association, an industry trade group. A cellphone is "always with us. It's always on."

iPhone maker Apple Inc. says it reviews each app before offering it to users. Both Apple and Google say they protect users by requiring apps to obtain permission before revealing certain kinds of information, such as location.

"We have created strong privacy protections for our customers, especially regarding location-based data," says Apple spokesman Tom Neumayr. "Privacy and trust are vitally important."

The Journal found that these rules can be skirted. One iPhone app, Pumpkin Maker (a pumpkin-carving game), transmits location to an ad network without asking permission. Apple declines to comment on whether the app violated its rules.

Smartphone users are all but powerless to limit the tracking. With few exceptions, app users can't "opt out" of phone tracking, as is possible, in limited form, on regular computers. On computers it is also possible to block or delete "cookies," which are tiny tracking files. These techniques generally don't work on cellphone apps.

The makers of TextPlus 4, Pandora and Grindr say the data they pass on to outside firms isn't linked to an individual's name. Personal details such as age and gender are volunteered by users, they say. The maker of Pumpkin Maker says he didn't know Apple required apps to seek user approval before transmitting location. The maker of Paper Toss didn't respond to requests for comment.

Many apps don't offer even a basic form of consumer protection: written privacy policies. Forty-five of the 101 apps didn't provide privacy policies on their websites or inside the apps at the time of testing. Neither Apple nor Google requires app privacy policies ...

Neither Apple nor Google requires apps to ask permission to access some forms of the device ID, or to send it to outsiders. When smartphone users let an app see their location, apps generally don't disclose if they will pass the location to ad companies.

Lack of standard practices means different companies treat the same information differently. For example, Apple says that, internally, it treats the iPhone's UDID as "personally identifiable information." That's because, Apple says, it can be combined with other personal details about people—such as names or email addresses—that Apple has via the App Store or its iTunes music services. By contrast, Google and most app makers don't consider device IDs to be identifying information.

A growing industry is assembling this data into profiles of cellphone users. Mobclix, the ad exchange, matches more than 25 ad networks with some 15,000 apps seeking advertisers. The Palo Alto, Calif., company collects phone IDs, encodes them (to obscure the number), and assigns them to interest categories based on what apps people download and how much time they spend using an app, among other factors.

By tracking a phone's location, Mobclix also makes a "best guess" of where a person lives, says Mr. Gurbuxani, the Mobclix executive. Mobclix then matches that location with spending and demographic data from Nielsen Co. ...

Apps have been around for years, but burst into prominence when Apple opened its App Store in July 2008. Today, the App Store boasts more than 300,000 programs.

Other phone makers, including BlackBerry maker Research in Motion Ltd. and Nokia Corp., quickly built their own app stores. Google's Android Market, which opened later in 2008, has more than 100,000 apps. Market researcher Gartner Inc. estimates that world-wide app sales this year will total $6.7 billion.

Many developers offer apps for free, hoping to profit by selling ads inside the app. Noah Elkin of market researcher eMarketer says some people "are willing to tolerate advertising in apps to get something for free." Of the 101 apps tested, the paid apps generally sent less data to outsiders.

Ad sales on phones account for less than 5% of the $23 billion in annual Internet advertising. But spending on mobile ads is growing faster than the market overall. Central to this growth: the ad networks whose business is connecting advertisers with apps. Many ad networks offer software "kits" that automatically insert ads into an app. The kits also track where users spend time inside the app.

Some developers feel pressure to release more data about people. Max Binshtok, creator of the DailyHoroscope Android app, says ad-network executives encouraged him to transmit users' locations. Mr. Binshtok says he declined because of privacy concerns. But ads targeted by location bring in two to five times as much money as untargeted ads, Mr. Binshtok says.

"We are losing a lot of revenue."

Other apps transmitted more data. The Android app for social-network site MySpace sent age and gender, along with a device ID, to Millennial Media, a big ad network.

In its software-kit instructions, Millennial Media lists 11 types of information about people that developers may transmit to "help Millennial provide more relevant ads." They include age, gender, income, ethnicity, sexual orientation and political views. In a re-test with a more complete profile, MySpace also sent a user's income, ethnicity and parental status.

A spokesman says MySpace discloses in its privacy policy that it will share details from user profiles to help advertisers provide "more relevant ads." My Space is a unit of News Corp., which publishes the Journal. Millennial did not respond to requests for comment on its software kit ...

How would Apple learn who a cellphone user's friends are and what kinds of media they prefer? The patent says Apple could tap "known connections on one or more social-networking websites" or "publicly available information or private databases describing purchasing decisions, brand preferences," and other data. In September, Apple introduced a social-networking service within iTunes, called Ping, that lets users share music preferences with friends. Apple declined to comment.

Tech companies file patents on blue-sky concepts all the time, and it isn't clear whether Apple will follow through on these ideas. If it did, it would be an evolution for Chief Executive Steve Jobs, who has spoken out against intrusive tracking. At a tech conference in June, he complained about apps "that want to take a lot of your personal data and suck it up."