AI Trainer & Nutritionist
Ask anything from program design, nutrition, recovery, or what to work on next. It knows your lifts, your injuries, and your goals, so the advice is actually yours.
STHENA
Personal trainer · Nutritionist · Form coach
Train like you have a $500/month coach
Sthena combines an AI personal trainer, nutritionist, and form coach in one app. It knows your lifts, fixes your technique, builds your program, and answers your nutrition questions — all from your data.
7-day free trial · No charge until trial ends · Cancel anytime
AI Trainer
You squatted 185lb last Tuesday - solid. Push to 190 this session. For your cut, aim for 2,600 calories and 185g protein today. Want me to build out your full week?
Form Report
73
/ 100
Needs work
Primary fault
Left knee collapsing at depth
$0
Personal trainer fees replaced
7 days
Free trial, no charge
8-in-1
Trainer · coach · nutritionist · tracker · analyzer · meal plans · body metrics · food log
AI Form Analysis
Upload one set you're unsure about. Get a form score out of 100, your biggest fault, and exactly what to fix — then discuss it directly with your trainer.
Workout Generator
Tell it your goal, equipment, and schedule. Get a full weekly training program in seconds with sets, reps, rest times, and coaching tips for every exercise.
Workout Tracker
Log sets by voice — just say what you lifted. See progressive overload suggestions from your last session, track PRs, and watch your strength trends over time.
Body Metrics & Food Log
Track your weight, body fat, and waist over time. Log meals and get macro estimates automatically. Your trainer sees all of it and factors it into every recommendation.
Meal Plans
Get a structured 7-day meal plan tailored to your calorie and protein targets. Breakfast, lunch, dinner, and snacks. Built around your goals and preferences.
How it works
Everything in one loop
01
Talk to your trainer
Ask about your program, nutrition, or what to work on next. Your trainer knows your data — it gives real answers, not generic advice.
02
Analyze your form
Upload a set you're unsure about. Get a score, your biggest fault, and coaching cues. Then discuss it directly with your AI trainer.
03
Log and improve
Log sessions by voice, see progressive overload suggestions, and watch your form scores climb as your technique gets dialed in.
Pricing
Less than one session with a trainer
Try any plan free for 7 days. No charge until your trial ends. Cancel anytime.
Essentials
Perfect for lifters who want consistent coaching and feedback.
$35/month
- 40 form analyses / month
- 4 meal plan turns / month
- AI Trainer & Nutritionist (300 msg / month)
- Workout tracker, body metrics & food log
Pro
Most popularFor serious lifters training multiple movements every week.
$69/month
- 120 form analyses / month
- 8 meal plan turns / month
- AI Trainer & Nutritionist (600 msg / month)
- Full history, trends & deeper insights