Caitlin McGarryStaff Writer, Macworld

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Caitlin covers Apple news, health and fitness tech, and social networks from IDG's New York bureau.

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Vi AI Personal Trainer review: Heart rate-tracking Bluetooth earbuds with serious potential

These $250 Bluetooth earphones pack in a heart rate sensor, voice-coaching, and gorgeous Harman/Kardon sound in one lightweight package. But they're hindered by an ultra-narrow focus on one type of exercise.

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Twitter stops counting usernames in replies toward the 140-character limit

This change is coming to Twitter’s iOS and Android apps as well as Twitter on the web.

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5 Samsung Galaxy S8 features Apple should steal for iPhone 8

The iPhone 8 would benefit from the Galaxy S8's edge-to-edge display, augmented reality camera, and a smarter assistant.

on macworld.com

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Facebook goes full Snapchat with disappearing Stories

Camera filters, selfie masks, and direct messaging are coming to the main Facebook app. Good luck, Snapchat.

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Fitbit Alta HR review: The best fitness tracker for most people

Powerful sleep-tracking, 7-day battery life, and a heart rate sensor make Fitbit's latest fitness band practically perfect.

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Every new product Apple just announced: iPad, red iPhone 7, Apple Watch bands, and more

Pricing, availability, and all the details on Apple's new devices and software.

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Apple refreshes Apple Watch bands and iPhone cases with new colors for spring

The Apple Watch band lineup now finally includes a stand-alone Nike Sport option.

on macworld.com

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Apple's bold new red iPhone 7 turns upgrading into a philanthropic decision

Apple introduced a flashy new red iPhone 7 and a storage boost for the iPhone SE.

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Buzz Aldrin in hologram form, a zero-gravity VR chair, and other SXSW 2017 moments you may have missed

Tech's annual "ideas" show has come to an end. From captivating art installations to impressive headset-less VR, here are some of the best things that SXSW 2017 had to offer.

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Sony's Wow Factory, complete with virtual reality suit, is why people go to SXSW

South by Southwest isn't CES, and that's a good thing. It's all about bringing bizarre prototypes and big ideas to life, like Sony did with its Wow Factory.

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Siri, Alexa, and robots could change how we talk

Sentient AI and super-smart robots are a long way off, but forgetting how to talk to other humans? That could happen soon.

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Buzz Aldrin’s hologram will take you on a dazzling virtual mission to Mars

The VR film “Cycling Pathways to Mars” is coming to Steam and HTC’s Viveport on March 17.

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8 of the weirdest, wildest, most WTF scenes from SXSW

Giant buffalo, car vending machines, and creepy handmaid sightings made South by Southwest even more bizarre than usual.

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Google Jacquard’s denim Levi’s jacket proves smart clothing isn’t a dumb idea

Google’s Project Jacquard collaboration with Levi's, a commuter-style denim jacket, gives wearables new life. We got hands-on at SXSW 2017.

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HBO brought its best shows to life at SXSW with an awesome escape room

Fans of Game of Thrones, Silicon Valley, and Veep were delighted by HBO’s clever SXSW installation.