Swim tracker for Apple Watch

Record a pool swim or an open water swim on your Apple Watch, or bring it in from Apple Health. Treblew shows your distance, pace per 100 m and heart rate, your SWOLF where Apple Health has it, and your open water route.

On the App Store. Free to download, with Treblew Pro inside.

How it works

1. Start a pool swim or an open water swim on Apple Watch. Water Lock turns on by itself.
2. Swim: the watch counts your distance and shows your pace and heart rate.
3. On iPhone, open the swim for what your watch measured.
4. Keep the app you like: every swim in Apple Health waits in Treblew for you to review, and asks whether it was in a pool or open water.

Each swim’s page

• Distance and pace per 100 m.
• Measured by Apple Watch: heart rate, time in heart-rate zones and energy.
• Swim efficiency: your SWOLF, strokes plus seconds for a length.
• Open water: your route on a map, and each 100 m’s pace and heart rate.

Goals, plans and Coach

• Count each swim toward one or more of your goals.
• A plan for it: a focus and the cues you want to keep in mind.
• Plan a swim for a time on your calendar, or repeat it each week.
• Ask Coach about your training. It answers from what you’ve recorded, and uses your measured values only if you allow it.

What you need

• An iPhone with iOS 17 or later.
• An Apple Watch with watchOS 10 or later, for distance and heart rate in the water.
• Pool swims on the watch are set for a 25 m pool.

Free and Treblew Pro

Recording swims on Apple Watch is free and unlimited. The Free plan includes 15 Coach questions a month and 3 goals and 1 plan at a time; Treblew Pro raises those limits.

Questions

Can I track swimming with Treblew?

Yes, on Apple Watch: pool swims and open water swims. The watch counts your distance and shows your pace per 100 m and your heart rate. Water Lock turns on by itself.

Does Treblew show SWOLF?

Yes, where Apple Health has it: a swim’s SWOLF, its strokes plus seconds for a length, read from Apple Health on your iPhone.

Does it draw my open water route?

Yes. Your Apple Watch records the route with the workout in Apple Health, and Treblew draws it on your iPhone, with each 100 m’s pace. Save your sessions to Apple Health to see it.

Is it free?

Yes. Recording swims on Apple Watch is free and unlimited. The Free plan includes 15 Coach questions a month and 3 goals and 1 plan at a time; Treblew Pro raises those limits.

Treblew is free to download on the App Store.