These are five new Digital Wellbeing experiment apps now available for Android phones.
The study also found that 1,565 asked for at least five dangerous permissions and 1407 had at least five embedded third-party ad libraries.
According to the Internet search provider, the previous version of MoboMarket already had over 4.5 million monthly active users in India and has a content library of over 500,000 apps and games.
Amazon's app store must compete with hundreds of local rivals offering paid and free apps, some of them pirated, and users often worry about malware when downloading from these sites.
It lets users test drive apps on the browser without having to buy them.
Amazon.com is planning to open an applications store that runs on Google Inc's mobile Android platform.
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