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One, three. From Wondry, I'm David Brown, and this is Business Wars Daily at the start of a new week.

Happy Labor Day, friends.

For those of you who have a smart

watch, we have a question. How necessary do you find it? We're betting that you just might leave

the house without it sometimes, but that your smartphone is always with you. Hmm? Does that sound

familiar? Well, the makers of smart watches are on a quest to make them just as essential to our everyday lives as our smartphones are.

And to do that, Apple and rival Fitbit have been transforming their watches from relatively simple fitness trackers

into potentially life-saving digital health devices.

You may have heard our story in February about Fitbit and Apple watch users who said their lives were saved when their smart watches alerted them to very fast or very slow heartbeats, and they sought medical help.

Well, now Fitbit is transforming its devices into accessories that do everything from tracking your heart rate to your weight loss, to your sleep, and beyond.

Last week, it announced a new

...