Free beta · open now

Your week, planned.
Every swim, built.
Every rep, timed.

The AI swim coach for iPhone and Apple Watch.

Get the beta on TestFlight

iPhone + Apple Watch. Free in beta.

Email me the link

How it works

  1. 1

    Set your goal

    Event, goal time, pool, days.

  2. 2

    Get your swim

    AI plans it. Pace math sets every clock.

  3. 3

    Swim it

    Your Watch runs every rep and keeps every split.

01 · Plan

A season that fits your week.

  • Ask for a plan in plain English
  • Add meets. It builds and tapers to race day.
  • Move, swap or skip days. One tap to undo.
Athylos schedule on iPhone with a meet on the calendar.
02 · Build

Name the time. Get the swim.

  • Built from your goal time, pool and gear
  • Every send-off computed from your pace, never guessed
  • All strokes. SCY, SCM, LCM.
  • Snap a whiteboard to import any set
A generated workout on iPhone with send-offs and training zones.
The workout on Apple Watch, rep by rep.
03 · Track

Every rep timed. Every split kept.

  • Rep-by-rep guidance on your wrist
  • Splits, pace, zones and race projection
  • Ask your coach about your swims. Get the chart.
Athylos analytics on iPhone: a finished swim with every split.
Apple Watch summary with every split.
Founding swimmers

Log one beta swim. Get 3 months of Swimmer free.

Log a swim in the beta before App Store launch. Free months start at launch; we'll email how to claim. One per person. Offer may change or end before launch. Swimmer then continues only if you subscribe (Terms).

Share · coming soon

Post your hardest set.

Story and feed cards. Tag @athylos_ai.

Design preview.

Pricing at launch

Free to start.

Free

$0

  • 5 AI workouts a month
  • 30 coach messages a month
  • Send to Apple Watch
  • Apple Health history

Swimmer

$9.99/month

or $99.99/year

  • Up to 300 AI actions a month
  • Season plans and paces
  • Rep splits and race projection
  • Everything in Free

1 month free.

Billed by Apple. Renews until canceled. Details.

Join in 3 steps

  1. 1

    Get TestFlight

    Free from Apple.

  2. 2

    Open the link

    Beta link → Accept → Install.

  3. 3

    Swim

    Your first swim unlocks the founding offer.

Built for

🏊 Lap & masters

Show up with a plan on your wrist.

🚴 Triathletes

Structure for your weakest leg.

🔁 MySwimPro, SwimGPT, DuoSwim users

Workouts paced to your goal time. Compare free.

About

Built by a swimmer

Wilson Beckman, former Division I swimmer at Indiana University.

Swimming, meet modern technology.

Athylos eliminates the barriers to high performance. Built by Wilson Beckman.

Not on your iPhone?

We'll email you the link.

No spam. Privacy.

FAQ

What does it cost?

Free in beta. At launch: Free, or Swimmer at $9.99/month or $99.99/year with 1 month free. Pricing.

What do I need?

iPhone and Apple Watch. The Watch runs the set and times each rep.

My data?

Powers your training only. Sharing is opt-in. Never sold. Delete anytime. Privacy Policy.

Feedback?

Screenshot in the app → Share Beta Feedback, or support@athylos.com.

Is it stable?

It's a beta. Expect rough edges and tell us. Terms §4.

Contact

Questions, bugs, ideas: support@athylos.com. A person reads every one.

Your next swim is ready.

Get the beta on TestFlight