Vi Ai Fitness Tracker
Headphones with
Real-time Audio Coach



Vi Trainer App

12 Months Free

Special Offer
As low as $9.99/mo after that

90 Day

We know you'll love your Vi. But if for some reason you're not getting along with her you can return her for free no questions asked.

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Free Shipping

5-7 business days

Vi is built to go anywhere and everywhere. So, no matter where you are we've got you covered. Free global shipping on every order.

1 Year

Vi is designed for ultra sweaty and rugged adventures. If anything does happen, your Vi includes a 1 year warranty.

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Vi in the News

“The future of fitness can fit in your ear."

- The Wall Street Journal

"These headphones have helped me fall so deeply in love with running that I'm actually signing up for my first half marathon this year."

- PopSugar

"Vi...sounds like Scarlett Johansson.”

- Men's Fitness

"My Vi offers tips for making the most of my workout, and provides me with extra motivation when I feel myself slacking off."

- Business Insider

"We've found your new favorite gadget: Vi"

- People Health

"One of the most comfortable in-ear pairs of headphones that I've ever used.”

- Sports Illustrated

"The fantastic Harman Kardon-powered audio is some of the most impressive playback we've ever heard."

- Independent

A Trainer in your ears. On Demand.

On Demand Personal Trainer

Vi will coach you towards your goals in real-time, to your favorite music, on your schedule.

Fitness Tracker

Vi senses your distance, step rate, and heart rate in real-time and will tailor your workouts based on how you are doing.

Wireless Headphones

Vi's ergonomic design feels great while you work out and pumps beautiful sounding music using Harman/Kardon technology.

On Demand Personal Trainer

Real Time Guidance

Vi coaches you in real-time based on your biometrics, making for a more dynamic and effective workout.

Never dread another workout

Vi makes working out fun, more engagin, and fluid. No more static audio workouts.

Faster results

Vi understands your goals and creates a personalized plan to get you there. And she adapts as you go, always guiding you on the most efficient path to your goals.


Vi is always right in your ears, whenever and wherever you are. No more excuses.

Personalized to you

Vi's sensors allow her to know you better than a human personal trainer. Your workouts become more fun, effective, and personalized because of that.

Meet Vi

Heart Rate



Step Rate

Fitness Tracker

Vi measures your heart rate in real time using biometric sensors.

Some companies rely on vi's technology


For a limited time, get access to the Vi Trainer App free (with Vi Sense purchase). Instantly access personalized training plans, workout stats, and a library of workouts whenever you want! Available on iOS and Android.

Special Offer



$100 Value

Wireless Headphones

With Vi's all day battery life you can enjoy premium sounding music and calls.

Beautiful sound by

Phone Calls


8+ Hour Battery


Comfortable Design

Tech Specs

Embedded Headphone Sensors:

Heart Rate Sensor (very accurate)

6 axis acelerometer and gyroscope (motion, orientation, angular velocity)

Barometer (elevation)

In-ear detection sensor

Automatic Speech Recognition (ASR)

Earbud touch for voice trigger

Connections: Bluetooth, Wireless

Batteries: 1 Lithium ion battery (included)

Battery Life: 4-8 hours (depending on usage)

Dimensions: 7.5 x 6.5 x 3.2 inches

Weight: 1.3 oz

Beautiful Sound by Harman/Kardon

Compatibility: iOS & Android

Health Kit, Google Fit, Spotify & Strava Integrations

Voice Control

Phone Calls



What is Vi?

Vi is a first to market, voice-activated AI personal trainer that coaches and motivates you through bio-sensing headphones engineered for optimum sound by Harman Kardon. Vi tracks and measures multiple elements of your workout to provide accurate real-time feedback and coaching to help you to achieve real results (i.e. weight loss, running/cycling improvements, and more). Plus, Vi comes with a free companion mobile application - Vi Fitness (iOS / Android) - that integrates Apple Health, Google Fit, Spotify, and Strava.

Why Vi?

For many people, running or cycling can be dull, boring or even painful. But for 1000's of our current users, Vi has transformed their workouts into fun, sound-fueled experiences that get them into their optimal zone. Vi combines sweat-proof bluetooth headphones with amazing Harman / Kardon audio and space-grade biosensors (including in-ear heart rate). Her voice interacts with you while you workout – getting you to the right speed and pace for your goals, keeping you in your ideal heart rate zone and tracking your performance and records. Take Vi for a spin with confidence. Use our 90-day "No Questions Asked" Return Policy if you don't like the experience - simple as that!

Is Vi worth the price?

For most people, the average monthly cost of a personal trainer is around $250 USD. (Some trainers cost that much PER HOUR!) However, only a few of them have the ability to give you real-time feedback based on your own bio-metric data (heart rate, pace, distance, and step rate) to ensure you're always on-point and improving. With Vi, you get unlimited custom coaching, 24/7 usage (rain or shine), state-of-art technology (audio, six embedded sensors, ergonomic neck band with microphone, bluetooth connectivity, and more) and a real human voice providing fresh, custom content to ensure each Vi experience is better than the previous. For many, Vi provides more value in a couple training sessions than a human personal trainer ever could!

What activities does Vi help you train for?

Vi currently includes support for indoor/outdoor Walking, Jogging, Running, Sprinting, HIIT Runs and Cycling. Our supported activities will continue expanding every few months.

What new features are planned?

The long anticipated indoor running (treadmill) and Training Plans are now live. More music features and social sharing will be released soon, as well as more integrations with popular fitness and nutrition apps. We’re also exploring ways to have Vi support mindfulness (meditation) and overall health. Stay tuned for more on this really exciting area.

What kind of sensors do the Vi headphones have? Can they track my heart rate?

The Vi headphones have a couple different sensors, including a touch sensor (for interacting with Vi), a gyroscope (for rotational motion), accelerometer (for movement or vibrations) and a barometer (for elevation / atmospheric pressure). Plus they house a “custom” sensor that uses visible-light and infrared LEDs along with photodiodes, all in the left ear bud, to determine your heart rate. The headphones can also talk to your iPhone/Android's GPS and Wi-Fi to help with figuring out location and other information.

Do you need a phone to use Vi? If so, what do you support?

Yes, a phone with GPS capabilities is needed so that the Vi Fitness app can start and stop workouts, track biometrics, measure and store data, track features like elevation and location, and play music during training.

We support iOS (9+) and Android OS (Lollipop +) devices however we recommend having the latest OS on any device for the best Vi experience.

Are app and device updates free? What do they include?

Yes. App updates are pushed to your app via the Google Play Store or Apple App Store. App updates can include various feature improvements (stats, distance, music), appearance, new features, bug fixes and more. Device updates are done over-the-air via BLE to your phone and then device. These updates can include improvements to Bluetooth, sound, Vi’s internal sensors for voice recognition and physiological stats, and more.

What apps does Vi integrate with?

Vi integrates with Google Fit, Apple HealthKit, Spotify Premium, Strava, and the local music on your phone. We are currently working on integrations for Apple Music, and Google Play Music.

For a more detailed list of FAQ's, please visit our Support Page


Ratings & Reviews