The $99 Mio Link uses its optical sensor to track your heart rate.
Pricing not available
Fitbit's Charge HR combines heart rate tracking, sleep tracking and fitness into an affordable, slim band with good battery life. It's a hard combination to beat.
The update can automatically detect what kind of sport or activity you're engaged in, from aerobics to Zumba.
The change will only be visible to you, but it's the thought that counts.
A feature hidden in a developer version of Twitter's app shows emojis to express more emotions. That feature would add complexity to the service, but also nuance.
In a just-held briefing, NASA says that Pluto's "heart" will be named for the dwarf planet's original discoverer, a dark spot on moon Charon is called "Mordor," and Pluto is a relative newborn.
Commentary: A lifelong music lover, I've found that Spotify's streaming service is the best way to hear the songs I love most. To me, music services like this count among the most exciting technological achievements today.
Pluto, the focus of NASA's New Horizons spacecraft, has a softer side in the form of a distinctive heart-shaped feature on its surface.
Is the Millennium Falcon alive? That's just one of the questions answered when I watched the original Star Wars films in the popular Machete Order.
Technically Incorrect: Replacing a star with a heart is part of Twitter's strategy to become more universal, but it has put many current tweeters in a tizzy.