AI fitness app

The AI fitness app that
actually adapts.

PT Lab creates real workout programs — not generic templates. Tell it your goals, and it builds progressively harder routines that adapt as you get stronger.

Available on web

What you get in the app

Everything you'd want
in a real coach.

AI-Generated Workouts

Tap a button, get a complete workout tailored to you. The AI picks exercises, sets, reps, and weights based on your profile and history.

Per-Set Workout Logger

Log every set as you go. See what you lifted last time for each exercise. Track your personal records automatically.

Multi-Week Programs

Build structured training programs up to 26 weeks that get progressively harder. The AI handles periodization.

Daily Check-Ins

Rate your soreness, mood, and sleep each day. The AI uses this to adjust your next workout intensity.

Exercise Library

A curated exercise library with proper categorization. Filter by equipment, muscle group, or movement pattern.

Progress Dashboard

See your workout streak, total sessions, exercises logged, and personal records at a glance.

PT Lab vs other fitness apps

Real programming.
Not template-and-hope.

vs Generic Workout Apps

Most apps give everyone the same templates. PT Lab generates unique routines for your specific body, goals, and equipment.

vs ChatGPT / AI Chatbots

Chatbots give text responses you have to format yourself. PT Lab gives you a structured workout you can log sets against in real time.

vs Hiring a Trainer

A personal trainer costs $50–150/session. PT Lab gives you structured, progressive programming for $0–12/month — a similar approach at a fraction of the cost.

vs Spreadsheets

No more Googling exercises and building your own program. The AI handles exercise selection, volume, and progression automatically.

FAQ

Frequently asked questions

Is PT Lab really free?

Yes. The free plan gives you 3 AI-generated workouts per month with full workout logging, exercise tracking, and daily check-ins. No credit card required.

What does the AI actually do?

PT Lab's proprietary algorithm analyzes your profile — goals, restrictions, equipment, training history — and generates a complete workout routine with specific exercises, sets, reps, and weights. It feeds your logged performance back into its model so each routine is sharper than the last.

Can I use it without equipment?

Yes. Select 'bodyweight only' in your profile and the AI will program exclusively with bodyweight exercises and progressions.

Is it available on my phone?

PT Lab works on any device with a browser. No app download required.

How is this different from having a real coach?

PT Lab is designed by coaches and uses exercise science principles. For most people, AI programming is more than enough. If you want a human coach later, PT Lab supports that — coaches use the same platform to program for their clients, and your full history transfers with you.

The smartest fitness app
you'll ever use.

Start free. Upgrade when you want more AI workouts.