But while these are important, they don’t make up the full picture.” Tracking voice tone Sharing details on the device’s tone-tracking technology, Amazon Halo’s principal medical officer, Dr Maulik Majmudar, wrote: “When we look at devices that track and measure our health, we’re hyper-focused on the physical elements like activity, weight or sleep. In addition, Amazon’s blogpost about the device highlights how the Halo is focused on analysing “energy and positivity” in a user’s voice. Users can’t check their daily progress by glancing at their wrists, but rather by using the accompanying app on their phones. The device has no display, meaning that activity is tracked in the background, so to speak. While the device does track typical measures of fitness and activity, such as physical movement, sleep and heart rate, it appears that Amazon’s new Halo device is taking a different approach to competitors. It communicates with a user’s phone via Bluetooth. Unlike Fitbit and the Apple Watch, the fitness band does not have a range of connectivity options, such as GPS, Wi-Fi or cellular. Amazon did not mention if the device would have Alexa integration, but those microphones will be used for a feature dedicated to tracking a user’s mood through the tone of their voice. Some of Halo’s features include an accelerometer, a temperature sensor, a heart rate monitor, two microphones and an LED indicator light. It is first launching as part of an early access programme, where users will pay $64.99 for the device and six months of the subscription service. The Amazon Halo wearable will cost $99.99, while the companion subscription service that offers advanced features and insights will cost users $3.99 per month. On Thursday (27 August), Amazon announced its new fitness band and subscription wellness service, Halo. Amazon has launched its own fitness wearable with voice-tracking technology.