Android smartwatches will connect wirelessly to a mobile phone and can be outfitted with a variety of sensors, Google said. That means that apps developed for Android watches will be able to monitor fitness and health information such as a wearer's heart rate or distance jogged.
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Google has also been developing Google Glass, a small stamp-sized screen attached to a pair of eyeglass frames. Google Glass can record video, access email, provide turn-by-turn driving directions and retrieve info from the Web by connecting wirelessly to a user's cell phone, but it has also raised concerns ranging from privacy intrusions to distracted driving.
Smartwatches have a better chance of catching on with the general public than Google Glass, said Ramon Llamas, an analyst with industry research firm IDC.
"It's a really cool idea, but there's something that creeps people out about it," Llamas said of Google Glass.
The success of smartwatches will depend on the device's price, battery life and the appeal of the watches' designs, he said.
Motorola said it would share more details about its forthcoming Moto 360 smartwatch when it holds a special online press conference on Wednesday. Google recently announced plans to sell its Motorola business to Chinese PC-maker Lenovo Group Ltd.
Juniper Research expects more than 130 million smart wearable devices will ship by 2018. Moreover, global shipments of wearable "smart glasses" alone will reach 10 million each year by 2018, compared with an estimated 87,000 in 2013, according to the research firm.
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