AI Coach · $9.99/mo
Train hard.
Train smart.
No excuses.
An AI coach that rebuilds your session around your time, your gym, and your energy. Pair it with a real human trainer for full-on coaching. Your call.
Free to start · Cancel any time · No app to download
New · $9.99/mo, free with any coach
AI that adapts to your actual day.
Look, most "AI workouts" are just templates with a chatbot bolted on. This is different. It reads what you logged last week, asks how you feel today, and reshapes the session around your time, your gym, and your energy. Built for the days when life doesn't cooperate.
- Before you train. Tell it how long you have, where you are, and how beat up you feel. It rebuilds the session.
- During the workout. Squat rack taken? Weight feels too easy? Tap once, get a smart swap.
- Between sessions. Volume and intensity slowly climb based on what you actually did, not what was planned.
Minutes
30
Energy
2 / 5
Where
Hotel gym
- • DB Goblet Squat, 4×6 (swapped from barbell)
- • DB Romanian Deadlift, 3×8
- • Push-ups, 3×AMRAP (swapped from bench)
- • Bicep curl finisher, cut for time
How it works
Three steps.
No app downloads.
01
Pick a coach
Browse coaches by specialty and price. Read what their clients have said.
02
Start a program
Your coach builds a program around your week, your gym, and your goals.
03
Train and check in
Log sessions, message your coach, and review progress weekly.
A note from me
Why I'm building Flex Coach.
Hey, I'm Andrew. I'm based in Boston, and I've spent most of my life in the gym. Every time I tried to train with an online coach, the experience was the same: a PDF program, a generic app, and a coach who disappeared after week two.
On the other side, the trainers I know are stuck. They're stitching together five different tools (a workout app, a chat app, Stripe, Google Sheets, Calendly) just to run a small client list. They lose hours a week to admin instead of actually coaching.
Flex Coach is one place for both sides. Trainers run their whole business from a single link. Clients get a real human writing their program, plus an AI coach for the days when life gets in the way.
I'm building this in public, one feature at a time. If something's broken or you have an idea, email me directly at andrew.flexcoach@gmail.com. I read every message.
— Andrew Garber, Boston, MA
A look inside
Every coach gets a profile worth sharing.
Programs, reviews, and an intake form, all on one link. Here's an example.
Jamie Rivera
4.9 (37) · 6 yrs experience
I write strength-focused programs for working adults. No 6 AM bootcamps, no fluff. Just lifts that work and check-ins that keep you honest.
Monthly coaching
$149 / mo
New here? Start with intake.
Fill out intakeIntake for Jamie Rivera
New client intake
Example only. Coaches build their own intake (default questions or fully custom).
What you get
A coach in your pocket.
No gimmicks.
AI coach for the messy days
Woke up late, gym packed, beat-up legs? One tap reshapes today's session. Smart equipment swaps, load tweaks, and volume that matches your week.
Custom programs
Workouts built for your goals, schedule, and the equipment you actually have.
Direct messaging
Talk to your coach when you need to. Form checks, swaps, or a kick in the pants.
Track progress
Log lifts, weight, and notes. See what's working in plain numbers.
Weekly check-ins
Your coach reviews how the week went and adjusts the plan.
Vetted coaches
Real trainers with real reviews from clients who've trained with them for 30+ days.
Simple billing
One monthly rate, paid securely through Stripe. Cancel any time, no fine print.
FAQ
Common questions.
How much does it cost?+
Each coach sets their own monthly rate, usually $80 to $300/month. You pay your coach directly through Stripe. Flex Coach is free to use as a trainee.
Do I need a gym?+
No. Coaches build programs around what you have: full gym, home setup, hotel room, whatever. Tell them what's available and they'll work with it.
Is this beginner-friendly?+
Yes. Most clients are everyday people, not bodybuilders. Filter coaches by experience level and goal to find the right fit.
What if my coach isn't a fit?+
Cancel any time from your dashboard. Your billing stops at the end of the month and you can switch to a different coach.
How is this different from a generic workout app?+
There's a real human writing your program, watching your form check videos, and answering when you message. The AI Coach is a tool you use with them, not a replacement.
Who's behind this?+
Andrew, a lifelong lifter based in Boston, with a small team. Email andrew.flexcoach@gmail.com any time.