The Personal Trainer's Personal Trainer Software
Unlimited clients. One price. Build workouts, track nutrition, get paid — all in one AI-powered platform built specifically for solo trainers.
500+ trainers already growing with FitOS
Existing platforms are holding you back
We analyzed thousands of reviews. Here's what trainers hate about current software.
Per-Client Pricing
Most platforms charge you more as you grow. Adding 10 new clients shouldn't cost you $50+ extra per month.
Buggy & Slow
Crashes, sync failures, and painfully slow loading. Your clients deserve better — and so do you.
Desktop-Dependent
Need to edit a workout? Good luck doing it from your phone. Current tools are stuck in 2015.
Everything you need. Nothing you don't.
Built by trainers, for trainers. Every feature exists because you asked for it.
Workout Builder
Create and assign workouts in minutes. Drag-and-drop exercises, set reps, and save templates for reuse.
Nutrition Tracking
Adherence-neutral logging that encourages honesty. No red warnings. No shame. Just data.
Integrated Payments
Stripe-powered subscriptions and invoicing. Get paid automatically without chasing clients.
Wearable Sync
Connect Garmin, Fitbit, Oura, and more. Track sleep, HRV, and recovery — the metrics that matter.
AI Coaching
Coming soon: AI that learns your methodology and helps coach clients in your voice, 24/7.
Mobile-First
Full functionality on any device. Edit workouts, message clients, and check progress from anywhere.
Simple, transparent pricing
Unlimited clients. No per-client fees. No hidden costs.
Unlimited clients Workout builder & templates Nutrition tracking Payment processing Wearable integrations AI coaching assistant
No credit card required
Loved by trainers everywhere
"Finally, software that doesn't punish me for growing my business. I went from 15 to 40 clients without paying a dime more."
"The mobile experience is incredible. I can do everything from my phone between sessions. Game changer."
"My clients actually log their food now because there's no judgment. The adherence-neutral approach works."
Ready to scale your training business?
Join 500+ trainers who've already made the switch. Start your free trial today — no credit card required.
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