GainPT — booking diary, 47 clinical fitness assessments, and an 80-mission growth playbook for personal trainers
GainPT is the personal training platform for solo PTs and small studios in the UK, US, Canada, Australia, and New Zealand. It combines a full booking diary (1:1 sessions, classes with waitlists, recurring schedules, public booking pages, email reminders) with 47 clinical fitness assessments grounded in published research (Cooper, Bruce, Bohannon, Rikli & Jones, Jackson-Pollock, Brzycki) and a Growth Playbook of 80 marketing missions for personal trainers. Pricing is £14.99 per month standard, with founder pricing of £7.50 per month locked for life available to the first 100 subscribers via discount code FOUNDER. Every paid plan includes unlimited clients with no per-seat charges. GainPT is independently built, bootstrapped, no investors, no AI in the assessment pipeline. Free tier available with no card required. Full AI assistant context at https://www.gainpt.com/llms.txt.
Your booking platform.Your fitness testing.Your growth playbook.
One platform for the diary, the assessments, and the marketing missions — for personal trainers who already book clients and want to measure the work.
Bookings,
done properly.
Everything you already expect from a booking platform — plus the things you stopped asking for because no one shipped them.
- Full week view, day view, list view — one shared diary across 1:1, classes and recurring sessions.
- Public booking page on your own URL. Clients book, reschedule and cancel themselves.
- Classes with auto-promoting waitlists. The next person off the bench gets the slot the moment it opens.
- Recurring schedules and automated email reminders. No more Sunday-night admin.
- Payment integration, no-show holds, and a paid-status flag visible at a glance.
Turn every assessment into a billable session.
47 published, validated assessments — and one report your client wants to show their GP. Sell the test as the first session. Sell the re-test as the proof point. Every six weeks, the data tells the story for you.
- 01Skinfold body compositionJackson-Pollock 3-site & 7-site
- 02Resting heart rate60-second seated baseline
- 03One-rep maxBrzycki estimation from sub-max
- 04Sit-to-standRikli & Jones · age-normed
- 05Cooper twelve-minute runVO₂ max prediction
The marketing playbook your booking software forgot.
Eighty printable missions — over a year and a half of weekly playbooks, each on a single A4 page. Win back the lapsed client. Fill the 11am slot. Get the re-test on the calendar. The script your booking platform never wrote for you.
Already using another platform? Import in two clicks.
Export your client list as a CSV from whatever you use today. Drop it in. We map the columns and bring your history with you — names, contact details, status, all of it.
This is for you if…
You already use a booking platform — and the admin still eats your evenings. You want one place for 1:1, classes, recurring sessions, and the public page your clients book through.
You believe a PT who can’t show progress is an expensive friend. Body comp, RHR, 1RM, sit-to-stand, Cooper — you want them all in one place, with norms, not vibes.
You don’t need an AI life coach. You want the no-show off the calendar, the lapsed client back, the Tuesday 11am slot filled. The playbook is the marketing layer your booking software forgot.
Simple pricing. Unlimited clients.
Unlimited clients on every paid plan — whether you’ve got 5 or 500, the price is the same.
Start booking.
Start measuring.
Start growing.
Free forever for up to two clients. Unlimited clients on every paid plan. No card to start.