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Study: Android apps three times more likely than iOS apps to b sending data to high-risk third parties

The Me2B Alliance Product Testing team audited and analyzed a random sample of 73 mobile applications used by 38 schools in 14 states across the U.S., covering at least a half a million people (students, their families, educators, etc.) who use those apps. 

The research also showed that Android apps are three times more likely than iOS apps to be sending data to third parties, and are much more likely to be sending data to high or very high-risk third parties: 91% of Android apps send data to high-risk third parties compared to only 26% of iOS apps, and 20% of Android apps sent data to very high-risk third parties, compared to 2.6% of iOS apps.

Me2B’s audit methodology mainly consisted of examining data flow from the apps to external third-party vendors, by evaluating the software developer kits included in each app. The analysis found that the majority (60%) of school apps were sending student data to a variety of third parties. These included advertising platforms such as Google, to which about half (49%) of the apps were sending student data, as well as Facebook (14%). On average, each app sent data to 10.6 third-party data channels.

Two thirds (67%) of the public schools in the sample were sending data from apps to third parties. This finding is particularly troubling since public schools most likely utilized public funding to develop or outsource the apps – meaning that taxpayers most likely paid to fund apps that are sending student data to online advertising platforms. Moreover, public schools were more likely to send student data to third parties than private schools (67% vs. 57% of private school apps).

Another disturbing public-school finding: 18% of public-school apps sent data to what the Me2B Alliance deems very high-risk third parties – i.e., entities that further share data with possibly hundreds or thousands of networked entities. Zero private school apps in this study sent data to any very high-risk third parties.

Additionally, while not examined in detail, the analysis confirmed that the data sent to third parties typically included unique identifiers (through Mobile Advertising Identifiers, or MAIDs), thus enabling profile building for students – including those under the age of 13 – by third-party advertising platforms. 

Me2B says Apple’s new AppTrackingTransparency framework and changes to its incumbent IDFA (Apple’s mobile Identifier For Advertisers) system reduce the risk of the profile building that’s described in this research. This change increases the “respectfulness gap” between iOS and Android apps, although it may not fully remove the risk of profile building.

The Me2B Alliance is a nonprofit standards organization fostering the respectful treatment of people by technology. 

Dennis Sellers
the authorDennis Sellers
Dennis Sellers is the news editor of Apple World Today. He’s been an “Apple journalist” since 1995 (starting with the first big Apple news site, MacCentral). He loves to read, run, play sports, and watch movies.