Apple has been clear on their message to keep the iOS platforms clean from impurities. A new patent by the company is designed to prevent people from 'sexting,' or sending sexually explicit text messages. In addition to the ability to filter such messages, other filters can be used with the goal of improving the grammar or even language level of users.
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Neowin.net - Apple patents technology to combat 'sexting'
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Article
Neowin.net - Apple patents technology to combat 'sexting'