If you're looking for a particular street address, all you have to do is turn on your smartphone. But few individual buildings have been mapped inside. Some experts say the field of indoor navigation has a very bright future.
Smartphone apps such as NINA and KATWARN are supposed to warn us in the case of natural catastrophes or terror attacks. But how reliable are they? And how do they work? Here are some answers.
Deutsche Telekom estimates that up to 80 percent of adult refugees in Germany own a smartphone. The devices were critical for their odyssey to get here, and they could be vital to help them stay.
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