iOS 4 attacked for limiting adware creep
These efforts to protect users, which have not been duplicated by other mobile platforms, were targeted earlier this year in a report by David Sarno of the LA Times, which caused panic after it suggested Apple was tracking iPhone users' "precise" locations in some radical new way that other devices weren't, and incorrectly assumed that users were powerless to do anything about it.
In iOS 4, Apple enabled iAd and other independent ad networks to collect private information, but the company limits this data collection exclusively for use in improving ad relevance. Apple's SDK rules specifically forbid developers from including code in their apps that would forward private user information to third parties for any other reason, something the company's chief executive Steve Jobs characterized as granting users "freedom from programs that steal your private data."
Google fights for mobile adware
Android does not appear to have any restrictions on the private user data that apps can forward to third parties. Google also does not have an app approval process like Apple's App Store. This has led to malware attacks from apps listed in the Android Market, which have destroyed users' data, installed adware and sent spam to contacts email accounts.
Known occurrences of the misuse of private data within Android apps are based on independent testing of individual apps, and is not exhaustive. Apps may reach widespread circulation for months before their actual activities are discovered, as there is no curation of Android Market provided by Google and there is nothing preventing the distribution of malware outside the official Android software store.
Google's Android platform is also more susceptible to pressure from adware proponents because a much greater percentage of Android software is ad-supported rather than purchased outright by the end user.
The developer behind "Angry Birds" noted that ad-supported software is "the Google way," and recent market data by Distimo indicates that Android's app catalog has roughly twice the number of free apps as other popular platforms, thanks to Google's policies promoting ad-supported software.