Your test set, measured.
Lap by lap, stroke by stroke.
Swimtraxx One is a small sensor that clips on a flat silicone goggle strap. Put it on a swimmer for a time trial, a race-pace set or a technique check. Laps, splits, stroke rate, turn times and heart rate land in Swimtraxx Hub, and you can follow them live from the deck.
Free shipping. 14 days to return it. 2-year legal guarantee.
Optimized for competitive swimmers.
Clip it on your goggles.
See how you actually swam.
Swimtraxx One is a small sensor that clips on a flat silicone goggle strap. It records your laps, splits, strokes, turns and heart rate while you swim. Afterwards Swimtraxx Hub shows the session next to your plan or your coach’s.
Free shipping. 14 days to return it. 2-year legal guarantee.
Optimized for competitive swimmers.
Watch the set while they swim it.
Follow the set live from the deck. Every swimmer wearing a Swimtraxx One gets their own card. Connect the devices to your phone or tablet on the pool deck. Each swimmer’s card shows their heart rate and its zone, and every rep with distance, stroke and time. New data comes in every time the swimmer touches the wall, so the card updates after every length.
See who slows down on rep five, or whose heart rate stays high on the rest.
Real Live screen of Swimtraxx Hub, with demo swimmers on 8 x 100 free @1:30. Live tracking runs in the app on iPhone, iPad, Android and Mac, with several devices at once.
Follow your next set live from the deck.
Free shipping. 14 days to return it. 2-year legal guarantee.
Nine measurements from every pool session.
The device sits at your right temple and follows the movement of your head. From that it works out your laps, strokes and turns.
Heart rateOptical, at your temple. More below
Lap timeDetected automatically at the wall.
Stroke typeFly, back, breast and free.
Stroke rateStrokes per minute, per length.
Stroke countPer length and in total.
Turn timeFrom the turn to the push-off.
Underwater timeHow long you stay under after the wall.
Stroke lengthDistance per stroke.
Breath countYour breathing pattern.The Swimtraxx One is designed for the pool. In open water it records stroke rate, stroke count, stroke type, breath count and heart rate, but no distance: the swim is recorded as one long lap.
See how hard every set really was.See how hard the test set really was.
The Swimtraxx One measures your heart rate optically at the temple, through the whole session, with no chest strap. Afterwards Swimtraxx Hub draws it over the session, right next to your splits, stroke rate and stroke count.
- Set by set: where your heart rate climbs on the main set and how fast it drops on the rest.
- Next to the plan: an easy aerobic set should look easy. If it doesn’t, you see it.
Wear it with the sensor against the skin, under your cap, for the best reading.
Every length of a real swim.
A real 3,825 m session in a 25 m pool, recorded with a Swimtraxx One and shown on a demo account. Tap to see each view.
Your session in Swimtraxx Hub
Open the app at the pool side and the swim comes in from the device.
Your training diary, filled in by the device.
Free shipping. 14 days to return it. 2-year legal guarantee.
Test sets, race pace, turns.
Put it on the swimmers you are testing and get splits, stroke rate and turns for each of them, recorded automatically. Swimtraxx Hub is free for the whole team, with or without devices.
Time trials
Splits, stroke rate and stroke count per 50 for every swimmer wearing one, recorded automatically.
Race-pace sets
See where the stroke rate drops or the stroke count rises as the set goes on.
Turns and underwaters
Turn time and time underwater for every wall, set after set.
Put one on the goggles at your next test set.
Free shipping. 14 days to return it. 2-year legal guarantee.
What you see as a coach
On the swimmer’s page and for the whole team, after every session.
And while they swim: live tracking on deck.
Clip it on, swim, check the app.
- Clip it on the right side of your goggle strap. It fits flat silicone straps. The sensor needs skin contact at the temple, and you can wear it under your cap.
- Long-press the one-dot button to start. One buzz and it records. Long-press the two-dot button to stop: two buzzes.
- Open Swimtraxx Hub after the swim. The session comes in from the device and sits next to the planned workout.
Made by people who swim and coach.
Swimtraxx One was developed with competitive swimmers and coaches. The founder of Swimtraxx, Jeroen Lecoutere, has been in the sport for more than 30 years, as a national champion in swimming and lifesaving and later as a coach and head of the swimming section at one of the biggest swim teams in Belgium. He swam with teams in Belgium, the Netherlands, Singapore, Australia and at Ohio State in the US.
Used by swimmers and coaches in more than 25 countries.
Before you order.
Is it for me?
Swimtraxx One is made for competitive swimmers who train in a lane. The stroke detection is tuned on that kind of swimming. If your easy freestyle is slower than about 1:30 per 100 m, the results tend to be less reliable, because the sensor reads a consistent, efficient stroke best.
Do I need a subscription?
No. You order the device once. Swimtraxx Hub, the app the data goes to, is free, with no subscription and no paid tiers.
Is it a pair of smart goggles?
No. It clips onto the right side of the goggles you already use, on a flat silicone strap.
Can I wear it in a race?
Yes. Swimtraxx One is approved for racing under World Aquatics rule SW 15.3.
My coach doesn’t use Swimtraxx Hub. Does it still work?
Yes. Your swims go to your own account. Use Swimtraxx Hub as your training diary and join your coach’s team later with their code.
What do I see from my swimmers’ devices?
When a swimmer is in your team and the team shares Swimtraxx One data, you see their recorded swims on their swimmer page, next to the team plan. As the owner you decide what the team shares in the Sharing tab.
Which goggles does it fit?
Goggles with a flat silicone strap. It clips on the right side, so the sensor sits at your right temple. For heart rate the sensor has to touch the skin: with a wide visor like the Arena Cobra extended, wear it under your cap.
Which phones does it work with?
The device syncs with Swimtraxx Hub on iPhone and iPad (iOS 15 or newer), Android and Mac. Your swims are then also on the web at hub.swimtraxx.com. The web version cannot read the device itself.
What if it doesn’t work for me?
You can return it within 14 days of delivery, without giving a reason. The return shipping is at your cost. On top of that you have the 2-year legal guarantee. Read the refund policy
Where do you ship?
To almost every country, with PostNL. Shipping on the Swimtraxx One is free; the checkout shows it before you pay.
How accurate is it?
Laps, splits and strokes are worked out from the movement of your head, and the detection is tuned on competitive swimmers in a lane. Heart rate needs the sensor on the skin at the temple. The session on this page is a real swim, shown as recorded.
How does it work with several swimmers?
Each Swimtraxx One records the swimmer wearing it. In Live, every swimmer wearing one gets their own card.
Who sees my child’s data?
The swims go to your child’s own Swimtraxx Hub account. A coach sees them only when your child is in the coach’s team and the team shares Swimtraxx One data. Swimtraxx Hub is not directed at children under 13. Read the privacy policy
How long does the battery last?
About 8 hours of swimming. It charges on its magnetic cable in about 2 hours.
Does it work in open water?
The Swimtraxx One is designed for the pool. In open water it still records stroke rate, stroke count, stroke type, breath count and heart rate, but no distance: the swim is recorded as one long lap.
Measure your next test set.See how you actually swam.
Swimtraxx One syncs with Swimtraxx Hub, free on iPhone, iPad, Android and Mac. Your swims are then also on the web at hub.swimtraxx.com.
Free shipping. 14 days to return it. 2-year legal guarantee.
Optimized for competitive swimmers.