In the chat
Your whole week, one message away.
Coach Carl checks in after every workout and asks how you're feeling. He gets to know you — and bends your training plan around your life, so you reach your goal without getting hurt.
14 days free, then $29 $19/mo
It usually starts great. The first few weeks of your new training plan (pdf download) go well.
But then Tuesday happened:
The plan doesn’t care. It just sits there, saying “5 miles + 3 strides” like nothing changed.
So you chose from the only menu your plan offers:
These are all horrible options!
The plan becomes a scoreboard you're losing on, and nobody keeps opening a scoreboard they're losing on.
You stop looking at it.
Eventually you forget all about your plan and that it had ever existed.
Every runner has this graveyard: the couch to 5k that died still on the couch, the 16-week PDF that died in week 4, the endless Notion doc training plans cluttering up your workspace. None of them could bend. None of them could listen. And nobody noticed when you stopped caring.
But don’t worry. It’s not over.
Soon you will find a new plan, a better plan, and repeat the cycle.
Unless someone's actually paying attention this time.
No I’m not talking about expensive 1-on-1 coaching.
I’m talking about Carl.
In the chat
In the chat
How he remembers you
It starts with a conversation. Two minutes, no forms. Then he starts remembering.
Behind you: what you actually did. Ahead: what he's planned, and he'll move it if your week moves.
Most AI forgets. Carl doesn't.
The doctrine
The best training plan is the one you're healthy enough to follow next month. Carl watches load, listens when something's sore, and would rather cut one Tuesday than cost you a month on the couch.
Big engines are built by showing up, not by hero workouts. Ordinary weeks, stacked patiently, beat heroic ones followed by holes. Carl coaches the long game and protects the streak that actually builds you.
Bike rides, gym sessions, long walks: they're training, not footnotes, and Carl treats them that way. He also picks the work for how you're feeling today. Hips tight from a week at the desk? You might see hip mobility and glute activation in the plan instead of a generic core circuit. Strength isn't secondary: it's what makes you faster and more durable.
Built for busy adults: parents, professionals, people whose calendar fights back. Kids, work, travel, a rough night's sleep. Training bends but doesn't break: if a week goes sideways, that's okay. Carl rebuilds around it and keeps you moving toward the goal.
"If a week goes sideways, that's okay. Stuff moves. We work with your life, not against it." Carl
Every Sunday
Built from what you actually did, not what a template hoped you would. You say yes, or bend it and he sorts it out.
Real runners
Your options, honestly
| Human coach | Static plan | Most AI coaching | Coach Carl | |
|---|---|---|---|---|
| Knows youremembers your history, injuries, life | ✓ | ✗ | ~ | ✓ |
| Adapts when life happenssick, travel, sore, a bad week | ✓ | ✗ | ~ | ✓ |
| Always onanswers any hour, no waiting | ✗ | — | ✓ | ✓ |
| Talks like a coachnot a form to fill or menus to tap | ✓ | — | ~ | ✓ |
| Reads your runs automaticallyGarmin & Strava, no manual logging | ~ | ~ | ~ | ✓ |
| Coaching logic, not generic fitness tipsreal periodization, not one-size templates | ✓ | ~ | ~ | ✓ |
| Price | $200–500/mo | free–$15/mo | $10–30/mo |
A human coach is expensive — and not always there.
A static plan is generic — and bends for nothing.
Most AI coaching is robotic — and doesn't know when to back off.
Carl has personality. And he knows what he's doing.
Founding members
What founding members get, in writing:
$19/month, locked for life. Cancel whenever you like and come back later, and you return at your founding price, not the standard one. That's the whole rule, no fine print underneath it.
Every founding member's suggestion gets a direct answer from Jeremy: the decision and the reason. You're shaping the product with the person building it.
New channels, new features, new coaching tools: founding members get them while they're still being shaped.
Founder price, locked for life.
Cancel anytime.
Fit check
An AI coach built by Jeremy Singh, a runner and coach. Jeremy built him to coach the way he coaches: listen first, protect the athlete, play the long game. He talks with you in your texts (Telegram, WhatsApp, or SMS) like a coach would, because that's what he is.
No. Carl writes your weekly plan, but the plan is the least of it. The product is the conversation: the check-in after a rough run, the adjustment when your week explodes, the question about that ankle you mentioned twice.
The activities you sync from Strava or Garmin, and what you tell him. That's it. Your data is used to coach you, never sold.
No. Carl works best connected to Strava or Garmin, but tell him in plain words ("did another bike today, 30 min") and he'll track it.
Yes. The trial is free for 14 days, but a card is required to begin. You'll get a warning 72 hours before the first charge, and if you cancel during the trial you're never charged at all.
Yes. From the link in your receipt, or just tell Carl. If you cancel during the trial you won't be charged at all.
Carl meets you where you are. I built him to start you too easy rather than too hard, and if something hurts, the plan bends around it. He's not a doctor and won't pretend to be one; he'll tell you when something needs a human professional.
You get 14 free days before any money moves, and a warning 72 hours before the first charge, so nothing is charged without you seeing it coming. You'll know the feel immediately (the first check-in lands after your first run), but week two is where Carl proves it, because that's when a week goes sideways and he adjusts. If it never feels like coaching, cancel in one message and you won't be charged again.
Cancel in one message and you are never charged again. You keep full access for the rest of the month you already paid for, so nothing you bought is taken away from you. We don't refund a payment already made, and after that period ends you can still sign in to download your training data whenever you want.
The coach behind Carl
Hey, I'm Jeremy: running coach and ultramarathoner. I spent a decade training by data and getting hurt. Then I started running by feel, and the injuries stopped: 11,000+ miles over 10 years, 12 ultramarathons, a 100-mile finish, zero injuries. I built Carl to coach the way I coach: listen first, protect the athlete, play the long game.
The principles I coach from (McMillan and Magness on endurance) are the same ones Carl coaches from.
14 days free. Cancel anytime.
I've spent years running and coaching runners; Carl is that coaching, available every day, for every run.