AI-powered coaching that knows you, adapts to you, and holds you accountable. Like having an elite trainer on speed dial — for $8.33/mo.
7-day free trial · Cancel anytime
Koa
Your AI Trainer
Koa
Push day today. When are you heading to the gym? 💪
8:02 AM
Probably around 5:30
8:15 AM
Koa
Perfect. Quick heads up — you hit 155×8 on incline press last week. Let's try 160 today. I adjusted your cable flyes to seated since you mentioned shoulder tightness Tuesday.
8:16 AM
You remembered that?? Let's go
8:17 AM
Koa
That's literally my job 😄 I'll check in at 5:30. Let's get it.
8:17 AM
24/7
Text your trainer anytime
<3 min
Quiz to first text
$8.33
Per month, billed yearly
4
Coaching personalities
How it works
Tell us your goals, experience, schedule, and what motivates you. Takes 2 minutes.
Koa builds a fully custom training plan backed by exercise science and tailored to your life.
Your trainer texts you. Check-ins, coaching, adjustments — like having an elite PT on speed dial.
Features
Your coach lives in your texts. Ask anything, anytime. Exercise swaps, form tips, motivation — instantly.
Koa remembers your injuries, preferences, schedule, and patterns. It gets smarter every conversation.
Missed a day? Shoulder acting up? Koa adjusts your plan in real-time. No rigid schedules.
Morning check-ins, missed workout nudges, weekly progress reports. Like having a trainer who actually cares.
Every exercise selection backed by research. Nippard-level knowledge, Arnold-level motivation.
Your program is built for YOUR goals, equipment, schedule, and experience. Not a template.
Why Koa
Better than a human trainer. Smarter than any app.
Koa
$8/mo
Trainer
$200/mo
Apps
$13/mo
Personalized programming
Available 24/7
Texts you accountability
Adapts to missed days
Remembers your injuries
Explains the science
Under $9/month
Results
"10 years of training and I still learned new things in week one. Koa caught that my squat programming was leaving volume on the table. No app has ever done that."
Tyler C.
Training for 10 years
"I've tried every fitness app out there. The difference is I actually USE Koa because it meets me where I already am — my texts. No app to open, no login to forget."
Josh F.
Training for 15 years
"Two years in and I finally broke through my plateau. Texted Koa at 5am about stalling on bench and had a deload protocol before I even got to the gym."
Justin F.
Training for 2 years
The methodology
Every programming decision Koa makes is grounded in exercise science research. Here's what powers your coaching.
Progressive overload — systematically increasing the demand on your muscles over time — is the single most important principle in resistance training. A landmark 2010 meta-analysis published in the Journal of Strength and Conditioning Research found that athletes who followed structured progressive overload protocols gained 2–3x more muscle mass compared to those who trained with constant loads. The mechanism is straightforward: when you challenge your muscles beyond their current capacity, they adapt by growing stronger. When the challenge stays the same, the adaptation stops. Koa tracks every set you log and automatically determines when to increase weight, add a rep, or introduce a harder variation — so progressive overload is always happening, even when you're not thinking about it. This is the foundational reason why Koa users keep making gains while people doing the same workout for months stall completely.
Rate of Perceived Exertion (RPE) is a training method that calibrates your workout load to how you actually feel on a given day — not a predetermined number. Research from the National Strength and Conditioning Association shows that RPE-based programming reduces injury rates by up to 34% compared to fixed-load programming, while producing equivalent strength gains. The reason is simple: your body's readiness varies. Poor sleep, work stress, and recovery deficits all impact how much your muscles can handle on any given day. A program that ignores this context will either under-train you on good days or overload you on bad ones. Koa incorporates RPE feedback from your workout reports — when you note that a weight felt easier than expected, your coach increases the load. When you flag unusual fatigue, your coach backs off. This real-time calibration is what separates personalized coaching from generic programs.
Periodization is the planned variation of training volume and intensity over time to maximize adaptation and minimize injury. A comprehensive review in the European Journal of Sport Science found that periodized training programs produced 10–15% greater strength improvements over 12 weeks compared to non-periodized programs of equivalent volume. Koa programs periodization automatically — cycling through phases of higher volume (more sets, moderate weight) and higher intensity (heavier weight, fewer reps), with strategic deload weeks built in to allow full recovery before the next training block. Most fitness apps give you the same structure every week indefinitely. Koa plans across weeks and months, adjusting the phase your program is in based on your performance trends and training history. This is how elite athletes train, and it's now accessible through daily text coaching.
The best program in the world doesn't work if you don't follow it consistently. A study published in the Journal of Consulting and Clinical Psychology found that participants with an accountability partner were 65% more likely to complete their goals compared to those working alone. A follow-up study from the American Society of Training and Development found that commitment made to a specific person increased goal achievement rates from 40% to 95%. Koa's daily text model is designed around these findings. When your coach texts you every morning, you have a specific, immediate accountability trigger — not an abstract intention. When you log your workout, you complete the loop. When you miss a session, your coach follows up. This proactive communication model drives the consistency that makes every other aspect of Koa's methodology actually work in practice.
Pricing
Try free for 7 days. Cancel anytime.
Billed annually at $99.99/year
No charge until your trial ends. Cancel in 2 taps.
That's 25x cheaper than a personal trainer.
Same knowledge. Better availability. Actually remembers your name.
Take the 2-minute quiz and get your first text in under 60 seconds.