45 Days free return
2 Years warranty
24h Support

The world's first real-time data provider for swimmers

One real-time assistant
for all types of swim training
Real-time recommendations
Get instant feedback and correct your technique, increase your pace or slow down while swimming.
Music player
Diversify your workout with your favorite tracks, become more motivated and reach your goals easier.
Bone-conduction technology
Hear your metrics even when your head is underwater and keep focusing on your technique.
Hear the metrics in swim time
Listen to your favorite music while training
Open-ear Comfort
Our open-ear design powered by bone conduction technology ensures bud-free, comfortable listening all day, in or out of the water.
One-button Control
The one-button control system offers the possibility to turn-on, pause, skip and turn-off the music.
Two-types Uploading
Choose between using connection to smartphone via Bluetooth or dropping the music from your PC with an USB cable.
Know everything you are doing while swimming. SONR Tracker provides you the accurately tracked metrics through the bone conduction system.
Now you know your times at every lap.
Share your achievements with your mates using the export feature of SONR Tracker app.
Analyse your training log in Strava, Training Peaks, MySwimPro and many other apps you use.
Improve while swimming thanks to our AI software.
Our device tracks your metrics, analyse your performance based on set goals and gives you corrections while swimming and after-training guides.
SONR is not just a tracking gear, it is also a music player. Use it for following your results and upgrading your training as well as for a relaxing swim after a tough work day.
Be aware of your performance
Stay connected to your swim mates
Get training tips and improvement guides
Enjoy every minute of your swim time
SONR Tracker measures data from your temple and provides it to you during and after the training
Track your speed and time when swimming underwater. This helps you to get faster and reach higher results in each lap.
Underwater time and distance
Have the possibility to assess the symmetry of your stroke and develop a perfect technique.
Symmetric Stroke
Monitor your heart rate and ensure you are training at the optimum intensity.
Heart rate
Analyse your swimming power points and increase the strength and power by each split.
Stroke power
Other metrics you can hear
SONR Tracker is suitable for pool as well as for open water training.
The listed metrics are tracked in both environments with maximum accuracy.
Heart Rate
Swim Time
Stroke rate & Stroke count
Underwater time and distance
Turn time
Breath count
Swimming style
Stroke Power
Get your SONR Tracker now
Bone-conduction technology
Bone-conduction technology allows the swimmer to hear metrics, receive feedback, correct his technique right in the moment and listen to his favorite songs being underwater.

Thanks to the tempo beep feature, swimmer can easily identify and maintain ideal pace.
Using different modes, athlete can set the stroke rate and tempo, can monitor pace in different intervals and set rates depending on strokes per minute.
How to wear it
Thanks to its sleek and lightweight design SONR Tracker does not cause any discomfort.
After just a few minutes of wearing, swimmers forget about the tracker's presence and fully focus on the training.
How it works
  • 1
    Choose metrics you want to hear and the frequency of data delivery in your App
  • 2
    Place SONR Tracker on your head. You don’t feel its presence and don’t worry about losing it
  • 3
    Hear metrics while training and correct your swimming technique
  • 4
    Get metrics analysed in daily report and share your results with your coach and swim mates
Get all the info in periodic reports
Build-up your training plan or use SONR Tracker app's plans
Analyse your performance based on each metric and have a general overview
Be aware of your body condition, get recovery tips and know your limits
Export your workout to most popular platforms
SONR Tracker app offers a wide connectivity with other training platforms so you can export your training log.

Also, you can share the results with your coach and swim mates directly in the app.
Upload your coach's training plan into SONR Tracker app and hear each set while swimming.
Build-up your training plan directly in the app or use ours designed per type of swimmer and objectives.
Choose the best way to follow your training plan
Tri Swim Coach
Training Peaks
Stay focused on every lap with your fave music
You have two ways to upload your tracks to SONR Tracker: via Bluetooth or by connecting the tracker to your computer.
Plug the USB cable into your PC. Drag and drop your fave audio files into the drive.
Upload music using connection to smartphone via Bluetooth.
Volume level flashes intermittently
Press 1x - volume up
Press 2x - volume down
After 5 seconds return to regular mode
Hold the button to turn SONR Tracker on/off
Press 3x to enter volume change mode
Press 1x to start/stop music
Press 2x to turn on the next song
Get your SONR Tracker now
Tech Specs
Weighting just 50g
2 years
Battery life
3 h without charging
Supports mp3, WAV, WMA, AAC, FLAC
8 Led indicators
2,4 x 0,55 in (61 x 16 mm)
50 g
ATM5 (Waterproof)
Water resistance
2 Years
iOS and Android app
1 Gb
3D digital gyroscope
IMU Sensors
3D digital accelerometer
IMU Sensors
Texas instruments
HR Sensors
3 hour
Battery life
Battery type
2 hours
Charge time
5V - 0,5А
4 pin Magnetic charging cable
Charging cable
Bone conduction speaker
Compatible profiles
Frequency response
96 ± 3dB
Up to 10 Days
Standby time
Bluetooth v5
Wireless type
1 button mode
Pace, Swim Time, Pool Time, Underwater time and distance, Breath count, Heart rate, Stroke rate, Stroke count, Turn time, Swimming style, Stroke power, Symmetric stroke
New Sensor from Texas Instruments
What swimmers say
  • "Finally, I have a device to listen to music and to track my progress. It's really efficient for the endless pool training."
    Dave Collins
    Swimmer, USA
  • "This device is fantastic for training. I love the battery life. I can hear with absolute clarity while I am swimming."
    Jennifer Cook
    Open water swimmer, Australia
  • "SONR Tracker is the best assistant! I find it really helpful to hear my heart rate and time while swimming. And it's accurate and reliable."
    Samuel Evans
    Competitive swimmer, UK
  • "The sound quality was really clear. I would definitely look to have SONR Tracker as a permanent feature that I could use on our camps, trainings and events."
    Sharon Kim
    Swimmer, Israel
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SONR Inc is a company that develops technical innovations for sports. Dmitri Voloshin is the founder of SONR Inc, an entrepreneur from Eastern Europe, and more than a professional runner and swimmer.

Dmitri won the title of IronMan in Zurich, crossed the Bosphorus, became a national freediving champion, participated in the OceanMan swimming ultramarathon, and crossed the Strait of Gibraltar.

During his training sessions, he discovers the issues that he and other athletes face and tries to come up with ideas on how to solve them. Then, our team turns his ideas into reality.

We has successfully launched such products as SONR - a real-time communication system for swimming. SONR tracker was designed and developed by the same team that actively participated in SONR development.
Manufacturing and Development
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