Kai - AI Coach
Private beta - iOS and Android

One coach.Every domain.

Kai programs your training, nutrition, cardio, cycle tracking, recovery, and journaling as a single system. One coach across six apps, replacing the stack that does not know how you train, eat, and recover.

Get KaiSee how it works
All six apps and tracking, free forever
Pulls from Whoop, Oura, and Apple Health
Pay only when you want the coach
The stack you are stitching today
Kai - in one place
What athletes pay today
  • StrongLift$9/mo
  • RunnaPace$12/mo
  • MyFitnessPalFuel$13/mo
  • ClueMuse$13/mo
  • Whoop RecoveryEase$30/mo
  • Day OneMoment$4/mo
Stack total$81/mo
Kai

All six replaced. One coach. One memory of you.

$0
tracking - forever - coach optional
9:41
Lift
Kai
Lower body. Heavy.
Lift A - Back squat
5 x 5 @ 245 lb
Bar speed
0.62 m/s - on plan
Volume
12,200 lb - week
Lift
9:41
Pace
Kai
Easy Z2. 42 min.
Today
42 min - Zone 2
Target
144-158 bpm
Weekly
38 km - 3 of 5
Pace
9:41
Fuel
Kai
Carbs up. Squats today.
Macros
P 198 - C 320 - F 78
Window
Carbs +60g pre-lift
Logged
1,840 / 2,940 kcal
Fuel
9:41
Muse
Kai
Late luteal. Volume down.
Phase
Late luteal - day 23
Energy
Low - check-in saved
Across
Lift -1 set ยท Fuel +iron
Muse
9:41
Ease
Kai
Mobility. 18 min.
Readiness
78 - steady
Today
Hips - t-spine - 18m
HRV trend
52 -> 58 ms
Ease
9:41
Moment
Kai
How did training feel?
Prompt
What surprised you today?
Mood
Focused - 4 / 5
Streak
23 days
Moment
The coach

An AI coach.Not a tracker.

Kai reads every signal you produce and writes the next session, meal, and recovery block accordingly.

01

Adapts in real time

HRV dips overnight, so today's heavy squat moves to Thursday without you stitching apps together.

02

Programs across domains

When lifting is heavy this week, Fuel raises carbs and Muse shifts Lift volume for late luteal.

03

Learns your patterns

Eight weeks in, Kai knows when you bonk, when you surge, and when backing off is the work.

KaiWed - 06:42
HRV
38 ms
Sleep score
71
Readiness
64
Reasoning

HRV is two standard deviations below your baseline after a poor night. Heavy squat is high CNS demand, so Kai moves it 48 hours and drops in Zone 2 work to keep volume without forcing adaptation at the wrong time.

Today
Back squat 5 x 5 @ 245 lb
Zone 2 spin
45 min - 138-148 bpm
viaPace
Thursday
Tempo run 30 min @ 4:45/km
Back squat 5 x 5
@ 245 lb
viaLift
Ripple across apps
auto - in sync
Fuel
Carbs -60g - protein steady
Muse
Wind-down moved to 21:30
Ease
Add hip and t-spine, 14 min
Six apps

Six purpose-built apps.One shared coach.

Each app owns its domain. The coach is the same across all of them, with the same memory of how you train, eat, and recover.

Use one. Use all six. The coach is the same.
Built on your data

Kai pulls from every signal you already track.

Connect what you wear. Kai reconciles the data, weights it by reliability, and folds it into the next plan.

  • Bring your existing devices - no new hardware required
  • Conflicts reconciled automatically
  • Manual logs accepted and weighted by reliability
Data flowlive - last sync 28s
Health
Whoop
Oura
Garmin
Fit
Polar
Kai
Lift
Pace
Fuel
Muse
Ease
Moment
Sources Kai listens to
illustrative - final list at launch
Apple Health
Whoop
Oura
Garmin
Google Fit
Polar
Strava
Withings
Everywhere you train

Phone, watch,tablet, desktop.

The plan is the same on every surface. Open the app for the session you are in and the coach already knows.

iOS - Android - Web - macOS
iOS
iPhone - Apple Watch
9:41
Today
Lift A - Lower
Back squat - 5 x 5 @ 245
Romanian deadlift - 4 x 8 @ 185
Walking lunge - 3 x 10
Android
Phone - Wear OS
9:41
Today
Lift A - Lower
Back squat - 5 x 5 @ 245
Romanian deadlift - 4 x 8 @ 185
Walking lunge - 3 x 10
Web
kai.coach - anywhere
kai.coach
Lift
Pace
Fuel
Muse
Ease
Moment
Today - Lift A
Lift A - Lower
5 x 5 - 245 lb
HRV 52
RPE 7
Vol +6%
macOS
Desktop - menu bar
Kai - Menubar
Heavy squat moved to Thursday
HRV down. Today: Z2 spin - 45 min. Carbs -60g.
Lift
Pace
Ease
Pricing

Tracking is free. Coaching is the upgrade.

All six apps and every integration are free, forever. Pay only when you want Kai to program your training.

Free, forever

All six apps, core tracking, wearable integrations, and starter Kai conversations. Paid plans add more Kai usage and advanced workflows.

Free

all apps

Track across every app and start conversations with Kai.

$0/mo
Free forever
Start free
  • Every Kai app unlocked
  • Core tracking and profile basics
  • Starter Kai conversations
  • Cross-device account access
  • Wearable integrations

Core

all capabilities

All Kai capabilities across every app.

$8.33/mo
Billed $99.99/year
Get Core
  • All Kai capabilities
Recommended

Premium

all capabilities

All Kai capabilities across every app.

$16.67/mo
Billed $199.99/year
Get Premium
  • All Kai capabilities

Ultra

all capabilities

All Kai capabilities across every app.

$33.33/mo
Billed $399.99/year
Get Ultra
  • All Kai capabilities
One coach. Six apps. Every domain.

Stop stitching apps.Start being coached.

Kai is in private beta on iOS and Android. Web and macOS are on the same product path.

Get KaiJoin the waitlist
LiftPaceFuelMuseEaseMoment
Built for performance athletes.