Online booking
Clients book sessions against your real availability, with automatic reminders that cut no-shows.
For independent personal trainers
Software for independent personal trainers
Booking, payments, programming, and a professional website — everything you need to run your training business solo, in one place.
When you're an independent trainer, you're also the receptionist, the bookkeeper, the website builder, and the program designer. Most trainers cobble that together from a calendar app, a payment link, a spreadsheet, and a workout app — and spend hours every week keeping it all in sync.
Flex puts the whole business in one place: clients book and pay online, you build and track their programs, and your branded website does the selling — all from a single dashboard, starting at $59/mo.
Sound familiar?
The day-to-day headaches Flex is built to remove.
Chasing payments
No more sending manual payment requests or tracking who paid in a spreadsheet — clients buy packages and memberships online and money lands in your account.
Back-and-forth scheduling
Stop trading texts to find a time. Clients see your availability and book themselves, with automatic reminders.
Programs scattered everywhere
Build programs once, reuse templates, and let clients follow their workouts from any browser.
Looking small
A clean website on your own domain makes a solo trainer look as established as any studio.
How Flex helps
Get paid online
Sell sessions, packages, and memberships. Payouts go straight to your account.
Workout builder
Draft periodized programs in seconds with the AI builder, then fine-tune every set.
Progress tracking
Log PRs, body metrics, and goals with charts that keep clients motivated and renewing.
Branded website
A drag-and-drop site that takes bookings and payments — no code, no agency.
Most independent trainers start on the Trainer plan ($59/mo): branded website, unlimited clients, scheduling, payments, and the workout builder.
Frequently asked questions
Is Flex worth it for a solo trainer?
Yes — the Trainer plan is built for one-person businesses. At $59/mo it replaces a separate booking tool, payment link, website builder, and workout app, which usually cost far more combined.
Do my clients need to download an app?
No. Clients book, pay, and follow workouts in any browser. There's nothing to install.
Can I take payments and keep my own rates?
Yes. You set your prices and packages, and payouts go directly to your account. Flex never holds your money.
How long does it take to set up?
Most trainers are live within a day — build the site, add your availability, set up packages, and start booking.
See Flex in action for your business
Start your 30-day free trial. No setup fees, no contracts, cancel anytime.