I spent 25 years coaching Olympic and pro athletes. I built the app I always wanted.
Over 1,000 clients coached. Every piece of feedback — what kept clients engaged, what made them quit, what actually grew my business — went into J90. Now it's yours.
No credit card required. No contracts. Cancel anytime.
Years coaching Olympic & professional athletes
Clients coached — their feedback built this app
Days at a time — the system that gets results
Why I built this
I've coached at the highest level — Olympic training centers, pro locker rooms — and I've run a coaching business the hard way: spreadsheets, text threads, lost check-ins, clients drifting between sessions. The big platforms didn't fix it. They were built by software companies, not coaches.
So I built J90 around what actually keeps clients engaged and what actually grows a coaching business. Small habits. Big life. 90 days at a time.
— Dr J
Clients don't quit apps that feel alive
The #1 reason coaching clients churn is silence between sessions. J90 keeps them showing up every single day — without you lifting a finger.
A 30-second quiz every morning builds streaks, teaches your clients something, and keeps your app the first thing they open.
Every evening clients get a recap of their day. Every Friday you get a summary of each client — who crushed it, who's slipping.
Text, photos, and video right in the app. Read receipts, push notifications, and your face and brand on everything they see.
Scheduled check-ins, side-by-side photo comparisons, weight and measurement tracking — proof of progress that retains clients.
Everything you need to coach, in one place
A full exercise library, templates, and an AI program builder trained the way I program — then tweak every detail yourself.
Multiple meal plans for different day types — training days, rest days, refeed days. Clients snap a photo or scan a barcode and the macros log themselves.
Your booking link, your availability, automatic notifications — and it drops straight onto Apple Calendar or Google Calendar.
Your name, your logo, your colors, your headshot. Clients see 'Ask Coach You' — J90 disappears behind your business.
What coaches are saying
"My clients actually open the app every day now. The quiz and recaps keep them engaged without me chasing them."
Coach name
Strength coach, 40 clients
"I was juggling spreadsheets, text threads, and three apps. J90 puts everything in one place and feels like mine."
Coach name
Online personal trainer
"The supplement prescribing alone paid for the app in my first month. My clients love how organized it looks."
Coach name
Nutrition & lifestyle coach
Prescribe supplements. Get paid for it.
Build supplement protocols for each client right inside their program. They see exactly what to take and when — and you add a revenue stream most coaches leave on the table.
You won't set this up alone
Every new coach gets a free 1-on-1 onboarding call with me. I'll walk you through the app, help you load your first clients, and share what's worked for the coaches already on J90.
Coach like the pros. Run it like a business.
14 days free. Starter gives you up to 15 clients. Or grab the founders deal — Pro for $49/mo while spots last.
"Small habits. Big life. Let's get to work." — Dr J