Your coach is one text away.
Your coach is one text away.
Karb AI is an AI-powered nutrition coaching platform built for endurance athletes. Real macros. Personalized targets. Coaching delivered through SMS — the simplest tool you already use every day.
Karb AI is an AI-powered nutrition coaching platform built for endurance athletes. Real macros. Personalized targets. Coaching delivered through SMS — the simplest tool you already use every day.
$97/month · Cancel anytime · Spots limited
Most athletes train hard and eat wrong.
You’re logging miles. Hitting workouts. But your energy is inconsistent, your recovery is slow, and your race-day performance doesn’t reflect the work you’ve put in. The problem usually isn’t fitness. It’s fuel. Under-eating destroys training quality. Eating the wrong macros at the wrong time leaves performance on the table. And generic nutrition apps weren’t built for athletes who train twice a day and race on weekends. You need coaching that understands how your training load affects your fuel requirements — and adjusts when things change.
Step 1 — You tell us everything
Step 1 — You tell us everything
Fill out our intake form. Training volume, race goals, food preferences, schedule. We use this to build your personalized macro targets from scratch.
Fill out our intake form. Training volume, race goals, food preferences, schedule. We use this to build your personalized macro targets from scratch.
Step 2 — You get your plan
Step 2 — You get your plan
Within 24 hours, you receive a custom meal plan and macro targets designed around your actual training week — not a generic template.
Step 3 — You text. We respond instantly.
Step 3 — You text. We respond instantly.
Log your food by text throughout the day. Photos, descriptions, whatever's easiest. Our AI coaching system analyzes your log against your targets and sends back your numbers — consumed vs. remaining — with real, specific feedback.
Log your food by text throughout the day. Photos, descriptions, whatever's easiest. Our AI coaching system analyzes your log against your targets and sends back your numbers — consumed vs. remaining — with real, specific feedback.
Step 4 — We adjust as you go
Step 4 — We adjust as you go
Weekly check-ins track your progress. As your training load shifts, your targets shift with it. Hard week coming up? Carbs go up. Recovery week? We dial it back.
Weekly check-ins track your progress. As your training load shifts, your targets shift with it. Hard week coming up? Carbs go up. Recovery week? We dial it back.
AI-powered coaching built specifically for performance athletes.
Most nutrition apps were built for weight loss. Karb AI was built for athletes who train hard and need their fuel to match. Our AI coaching system is trained on performance nutrition principles — not generic calorie counting. It knows the difference between a long run day and a rest day. It knows that carbohydrates win races. And it responds in seconds, any time of day, without you having to open another app.
Belief 1: Protein is non-negotiable. Every client hits their target, every day. It's the first number we check.
Belief 2: Carbs win races. Most recreational athletes are chronically under-carbed or carbing at the wrong times. Carbs go up on hard days, down on easy days. We never restrict carbohydrates for a training athlete.
Belief 3: Less calories is not always the answer. Under-eating destroys training quality and stalls body composition. We don't starve our clients. We time their fuel.
Built for athletes who take their training seriously.
Karb AI was built for marathon runners, triathletes, Hyrox competitors, and CrossFit athletes who are done guessing about nutrition. You don’t need to be a pro. You need to be someone who shows up consistently, wants to perform better, and is ready to actually do the work on the nutrition side. If you’re chasing a PR, training for your first Ironman, or just tired of feeling gassed on runs that should feel easy — this was built for you.
Simple pricing. No hidden fees.
Simple pricing. No hidden fees.
Month-to-month. No contracts. Cancel anytime.
Month-to-month. No contracts. Cancel anytime.
Personalized macro targets
Custom meal plan at onboarding
Daily SMS coaching & food log feedback
Weekly check-ins & macro adjustments
Strava integration for training-load adjustments
Performance (Recommended)
Race-week nutrition protocol
Race morning fueling plan
Race morning fueling plan
Phase-specific plans (base, peak, taper)
Performance (Recommended)
Race-week nutrition protocol
Race morning fueling plan
Phase-specific plans (base, peak, taper)
We built this because the tools that existed weren’t good enough.
Generic calorie apps don’t know that you ran 18 miles on Saturday. Meal plans downloaded from the internet don’t adjust when your training week changes. And most nutrition coaches cost $300–500/month and still don’t respond when you actually need them — at 6am before a long run. Karb AI was built to solve that. An AI coaching system designed specifically for endurance and functional fitness athletes, delivered through the simplest possible interface: a text message. Our coaching philosophy is straightforward. Fuel the work. Protein is non-negotiable. Carbohydrates are rocket fuel, not the enemy. Consistency beats perfection every time. And under-eating is the most common performance killer we see — not overeating. We don’t do diet culture. We coach athletes.
No. Karb AI is a purpose-built AI coaching system trained on performance nutrition principles. It's not a generic AI assistant — it knows your targets, your training load, and your history.
How does SMS coaching actually work?
You text your food throughout the day — photos, descriptions, or both. The system analyzes it against your macro targets and responds with your numbers and coaching feedback. It takes about 30 seconds on your end and you get a response instantly.
What if my training changes week to week?
That's exactly what we're built for. Your Strava data feeds directly into your coaching profile. When your training load changes, your targets change with it.
Do I need to follow a specific diet?
No. We work around your food preferences, schedule, and lifestyle. Whether you're keto, vegan, or just love pizza—Karb AI adapts to you.
What kind of athletes do you work with?
Marathon runners, triathletes, Hyrox athletes, CrossFit competitors, ultra runners, and cycling enthusiasts. If your sport demands endurance, Karb AI is built for you.
Yes. Month-to-month, no contracts. Cancel from your account anytime.
You fill out a quick onboarding form. Our AI builds your personalized fueling plan within minutes—covering daily nutrition, training days, and race strategy. You get ongoing adjustments as your training evolves.
It's more than a meal plan. Karb AI gives you a complete sport nutrition system—pre-workout fuel, intra-workout carbs, recovery protocols, and daily nutrition targets all tailored to your training load.
How quickly will I see results?
Most athletes notice improved energy and workout quality within the first week. Meaningful performance and body composition changes typically show within 3-4 weeks of consistent use.
Do I need to follow a specific diet?
No. We work around your food preferences, schedule, and lifestyle. Whether you're keto, vegan, or just love pizza—Karb AI adapts to you.
What kind of athletes do you work with?
Marathon runners, triathletes, Hyrox athletes, CrossFit competitors, ultra runners, and cycling enthusiasts. If your sport demands endurance, Karb AI is built for you.
Yes. Month-to-month, no contracts. Cancel from your account anytime.
Spots are limited. We keep client numbers intentionally small so every athlete gets the coaching attention they need.
Spots are limited. We keep client numbers intentionally small so every athlete gets the coaching attention they need.
