Nobody wants AI in their ear during a workout.
Agreed.
The voice of your plan.
You write the plan, or your coach does. Kemosabe carries it into the workout on your iPhone and Apple Watch, holds you to it, and speaks only when something changes that the watch cannot tell you.
iPhone and Apple Watch. The watch app installs with it.
On your wrist and in your pocket.
The phone runs the workout and holds the plan, your numbers and everything he has said. The watch is a remote: one button to talk to him without taking the phone out.
Before you start
The next workout, your plans and goals from you or your coach, and who you are as an athlete. Three rows you can edit. He reads them before every workout.
Tell him
Up to three minutes, in your own words. What you ate, how the leg feels, what you want to know about the road ahead.
He answers
In your ear, and on the screen with the lines before it, so you can check what you half heard on the climb.
The watch is a remote
One button to talk to him, pause what he is saying, or dismiss it. No numbers to squint at. Your phone stays in your pocket.
[Vertical intro video, 9:16]
Black and white. Only he is in colour.He has done this for decades.
Kemosabe is the friend who has run the hills you are about to run. Warm without gushing. Plain without being harsh. Silence is his normal state.
He does not give orders. He says what he sees and what he would do. When the number on your wrist already tells the story, he lets it.
[Animated avatar slot: Kemosabe tips his hat on scroll-in, then holds still.]How it works
- 1
Bring the plan
Yours, or your coach's. The training plan, the goals, today's workout, and who you are as an athlete. He reads it before every workout. He carries the plan; he does not write it.
- 2
Press Start, pocket the phone
Running, walking or biking. The phone runs the workout. The watch app is a remote, so you can talk to him from your wrist without digging the phone out.
- 3
Tell Kemosabe
Talk to him from your watch or phone whenever you like. Ask what is ahead, or how you are doing against the plan. Tell him what you ate, or that the hamstring is a five. Otherwise he stays quiet and speaks when a number says something the screen does not.
- Optional
Bring your crew, or don't
Every workout is private until you share its link. If you do, the people you choose can follow where you are and leave you voice messages, and he reads them to you between his own lines.
Thirty miles of a hundred, with everyone watching.
On 17 October 2026 Joe ran the FSR 100 with Kemosabe in his ear and the live page open to family and friends. A storm had taken the course apart, the race was cut at mile 30, and the whole morning is on the page: his numbers, what Kemosabe said, and the messages that came in from Arizona, from a school bus, and from a man with a theory about bears.
- 28.6
- mi on the watch
- 6:13
- hours
- 3,860
- ft elev gain
- 40 of 70
- wake-ups spoken
The page is the product made visible. Whoever you share it with sees the map, the numbers and the whole conversation, live and afterwards, and can leave a message he reads to you between his own lines.
Open the replay-
Kemosabe 6:21
Mile one in just over eleven, and the heart rate’s settled to one twenty-eight now. Your cap’s working. Top of this grade in about a mile, then a short drop. Flask’s the clock: first one’s due about now.
-
Liz, Jody & Joan 9:24L
Great job and pace! We are cheering you on from Arizona!
-
Emme 10:37E
Wait wrong time he did ten seconds faster at 18:17
-
Kemosabe 10:37
Small correction on Asa: it’s 18:17, ten seconds faster than what I said, even better. Half a mile to the peak at twenty-nine.
-
Joe 11:27JR
Hamstrings are getting somewhat bad. Mostly my left. I’m tempted to say five of 10 pain, and it’s kind of going down to the Achilles. At this point, manageable, but it is starting to change my gait. Just log it at a five of 10 and I’ll check in on it periodically.
voice note · watch mile 25.6 -
Kemosabe 11:31
Fair correction, your body’s the readout. Take walking off the table. One thing in your favor: the next four point seven miles average under two and a half percent, so it’s a grade you can run easy without much hamstring load. Find the stride that works.
Quoted from the workout record. Voice notes are transcripts; some are trimmed for length.
Questions
What do I need?
An iPhone (iOS 26 or later) and headphones. That is all Kemosabe needs. A Bluetooth heart rate strap or a watch that broadcasts heart rate is optional, and so is an Apple Watch, which works as a remote.
What does it cost?
Nothing is charged yet. The app is not in the App Store, and pricing will be announced before anything is.
Does he talk the whole time?
No. Silence is his normal state. He speaks when something is worth your attention: a number the screen does not explain, a hill coming, a plan step you are drifting from. When you are working hard he says very little.
How do I talk to him?
Push to talk, from the phone or the watch. Hold the button, say what you want, and he answers in your ear. It works with up to three minutes of speech, so you can tell him what you ate or how the leg feels.
What does he know about me?
Three things you write or speak yourself: who you are as an athlete, your plan and goals, and today’s workout. He reads them before every workout, and you can edit them from the Start screen or on the web.
Does he write my training plan?
No. The plan is yours, or your coach’s. He carries it with you and says what he sees against it. He does not write it and he never speaks as your coach.
What if I forget to end a workout?
If you stop moving and say nothing for a while, Kemosabe checks in: still there? Three times, a few minutes apart. If nobody answers he goes quiet, and the workout keeps recording. Say anything, tap Next or start moving again and he is back. He also checks in after three hours with no word from you, even while you are moving, so a phone riding in a car does not keep him talking. The wait grows with the distance you have covered, so a long rest deep in an ultra is not cut short. After 36 hours with no word from you, your phone ends the workout, timed to when you last moved or spoke, and keeps everything it recorded. It never ends one while your phone is out of signal.
Which activities?
Running, walking and biking.
Can other people follow my workout?
Only if you share the link. Every workout is private until you do. People you choose can follow where you are, and leave you text or voice messages that he reads to you between his own lines.
Something is not working.
Tell Kemosabe in the app, the same way you would tell him anything else. We read every one of those. You can also write to us by email.
Is there a help site?
Not yet. Email reaches a person.
What happens to my data?
Your workouts are yours. What we keep, who sees it and how to delete it is in the privacy policy.
From the blog
All posts
Tell him what is broken.
In the app, tell Kemosabe what is working and what is not, the same way you would tell him anything else. We read every one of those. An AI does the first pass, a person does the second, and the bug reports and ideas go straight into the plan.