Train smarter.
Swim faster.

SwimTune is an AI swim coach and training platform that creates personalized, adaptive workout plans for swimmers of all levels, in the pool and in open water. It uses data from your Apple Watch, including stroke rate, split times, SWOLF, heart rate and recovery metrics, to build training sessions that adapt to your body, goals, and progress. Think of it as having a personal swim coach that knows your data inside and out.

Unlike apps that offer generic workout libraries or raw data dumps, SwimTune uses AI to create truly adaptive training plans. Every session adjusts based on your recovery state (sleep, HRV, resting heart rate), recent performance, and long-term goals. The AI coach explains each workout in plain language: why you're doing it, what to focus on, and how it fits your progression. It's the difference between a workout list and an intelligent training system.

It also doesn't need hardware you don't own: no proprietary goggles, no specific watch brand. See a full side-by-side comparison of SwimTune, MySwimPro, FORM and Garmin.

Yes, and tracking is the part that's free. SwimTune records your swims on Apple Watch with automatic lap counting and stroke type detection, or imports swims already sitting in Apple Health, including ones recorded on a Garmin. You get a full swim log with splits, stroke rate, SWOLF, distance per stroke, heart rate zones and pace per 100m, plus long-term trends and training load, without paying anything.

Where it stops being just a tracker is what happens next: SwimTune reads that history and writes your next workout from it. See exactly what gets tracked.

Yes. You can record an open water swim directly on your Apple Watch, import ocean and lake swims from Apple Health, or log one by hand. SwimTune knows the difference between a pool session and an open water one and treats them differently: open water swims never get a phantom pool length, and their pace is deliberately kept out of your CSS calculation and personal records, because current, sighting and the absence of push-offs make that pace incomparable to pool pace.

On the training side, "Open Water Swim Focus" is a goal you can pick, and the plans built around it emphasise continuous swimming, bilateral breathing and sighting practice, building toward your event distance, typically 750m, 1500m or 3800m depending on your level. Open water races go in the calendar from 1500m to 10km, or at any custom distance you enter. Note that SwimTune doesn't record a GPS route or draw a map of your swim; distance comes from the workout your watch measured. Read the open water training guide.

SwimTune runs on Apple Watch and iPhone. The Apple Watch app records pool and open water swims live; the iPhone app handles planning, analysis and the AI coach.

If you swim with a Garmin today, your swims already flow into SwimTune as long as Garmin Connect writes them to Apple Health: they import with the right venue, distance and splits. A native Garmin watch app is in development and planned for fall 2026, with Google Wear OS and Google Health Connect to follow.

SwimTune tracks 12+ swim metrics automatically via your Apple Watch including: stroke rate, split times, SWOLF score, distance per stroke (DPS), heart rate and heart rate zones, lap count, pace per 100m, stroke count, rest intervals, and training load. It also integrates health data like sleep quality, HRV, and resting heart rate to calculate a daily recovery score.

Yes. SwimTune supports all levels from complete beginners to elite competitors. Beginner plans start with shorter sessions (around 800m), draw on a guided drill library covering the fundamentals like catch-up, fingertip drag, sculling and fist drill, use plain-language coaching, and focus on building comfort and consistency. The AI coach adapts its language and expectations based on your level: beginners get encouragement and technique tips, while advanced swimmers get periodization and race-pace targets. See example workouts for each level.

CSS (Critical Swim Speed) is a measure of your aerobic swim threshold, the fastest pace you can sustain for 20 to 30 minutes. It's the swimming equivalent of FTP in cycling. SwimTune walks you through a guided CSS test (a 400m and a 200m time trial, or a simplified 200m/100m version) and turns the result into five training pace zones: Recovery, Aerobic, Threshold, VO2max and Sprint. For beginners, the CSS test is introduced gradually around weeks 6–8 once sufficient fitness is built. For intermediate and advanced swimmers, it's part of the initial baseline testing. Full guide to CSS testing and pace zones.

For the swim leg, yes. SwimTune is a swimming app, not a triathlon app: there's no bike or run training in it, and it won't build you a full multisport plan. What it does cover is the discipline most triathletes are weakest at. Set an open water goal, add your race with a custom distance (1.9km for a 70.3, 3.8km for a full, 750m or 1500m for sprint and Olympic), and your plan builds continuous swimming, sighting and pacing toward that date, with the taper handled for you.

If you already track bike and run elsewhere, SwimTune slots in as the swim-specific layer. Read the triathlon swim training guide.

You add your races to a calendar and mark each one A, B or C: an A race is the one the season is built around, B races matter but aren't the goal, C races are training. Your plan then reshapes itself around those dates, including the taper, so volume comes down at the right time without you having to guess.

On race morning the app recognises it's race day and gives you a warm-up, a pacing plan and a checklist. Afterwards you log your final time, your splits and how the race actually felt, which feeds back into what the plan does next. Pool events (50m to 1500m, all four strokes and IM) and open water events (1500m to 10km, or any custom distance) are both supported.

SwimTune is free to start: recording and importing workouts, your full history and analytics, training load, and the recovery and readiness signals cost nothing, with no time limit.

SwimTune Pro adds the AI parts (training plans that adapt as you swim, the coach chat and daily briefing, and session adaptation) at $19.99 per month or $109.99 per year, with a 7-day free trial.

SwimTune arrives on the App Store this week for Apple Watch and iPhone. Leave your email and we'll tell you the day it lands, and again when native Garmin support arrives in fall 2026.