Muscle gain, weight loss, and more

Fitness with
artificial
intelligence

Personalized AI workout plans, AI trainer chat, photo body analysis. Home, gym, or outdoors.

Download on theApp Store
Get it onGoogle Play
4.5
rating
2300+
ratings
24/7
AI trainer
F/AI app on iPhone — personal AI fitness trainer
F/AI — AI-generated personal workout program screen

Everything for results

An AI trainer that knows your goals, body metrics, and limitations. Workouts at home, in the gym, or outdoors.

AI Workout Plans

Personalized plans powered by AI. Muscle gain, weight loss, strength building, or staying fit.

Unlimited AI Chat

Ask about technique, nutrition, recovery. The trainer responds instantly and remembers context.

Photo Body Analysis

Upload a photo and get: body type, body fat percentage, measurements, strengths, and recommendations.

Workout Tracking

Sets, weight, reps. Rest timer, video instructions, and rep history for every exercise.

Smart Exercise Replacement

AI finds alternatives: with dumbbells, bodyweight, for home, accounting for injuries.

Deep Personalization

23 profile parameters: goal, experience, equipment, health, stress, sleep, flexibility, and workout location.

F/AI photo body analysis — body type and body fat percentage detection
14.2%
Fat
68.5
Lean mass
Mesomorph
Type

Body analysis
from photo

Upload a photo and get a personalized analysis. AI will determine your body type, body fat percentage, and provide recommendations.

Body fat & lean mass
Body composition analysis from a photograph
11 body measurements
Neck, shoulders, chest, waist, biceps, hips, calves
Body type & recommendations
Ectomorph, mesomorph, or endomorph. Strengths and action plan

AI Chat with trainer

Ask a question and AI will help with fitness. Technique, nutrition, workout programs, recovery.

Example prompts
How to improve running endurance?Create a muscle gain planWhat are the best ab exercises?What to eat before a workout?How to properly do a deadlift?What weight for bench press?How to avoid overtraining?Create a 20-minute workout
Exercise replacement
Replace with a dumbbell versionNeed something easier on the kneesFor home conditionsWith bodyweight only
AI Chat
Online
What plan works for weight loss?
I recommend a plan focused on cardio and circuit training 3-4 times a week. Let's start with moderate intensity.
What exercises work for home?
Burpees, planks, squats, lunges, push-ups. I can create a 20-minute workout for you!
Message...

Tell us about yourself

For AI to create a personalized plan, it needs information about you. 23 parameters for maximum personalization.

Goal
Build muscle mass
Lose weight
Increase strength
Stay in shape
Body
Height, weight, age, gender
Current and target body fat %
Current and target weight
Target muscle groups
Experience
Beginner / Intermediate / Advanced
Frequency: 1-5+ times per week
Duration: up to 30, 30-60, 60+ min
Home, gym, or outdoor
Health
Issues: back, knees, arms, heart
Stress level
Sleep quality
Flexibility level
Free weightsMachinesBodyweightResistance bandsSuspension systemsFunctional trainingBalance & stability
Available equipment is considered when generating your plan

How it works

1

Tell us about yourself

Complete a quick onboarding: goal, experience, equipment, health issues. AI considers every parameter.

2

Get your personal plan

AI analyzes data, creates a program, and selects optimal exercise parameters.

3

Work out and ask questions

Follow the plan, log your sets. Unsure about technique? Ask the AI trainer. Need a swap? AI will find one.

4

Track your progress

Photo body analysis shows real changes. Track weight, measurements, and strength metrics.

268,974 users

already train with F/AI. Join them!

211,025
workout plans created
139,690
messages to AI trainer
87,158
workouts completed
Goals
Muscle gain50%
Weight loss35%
Endurance7%
General fitness3%
Audience
Men76%
Women24%
View live statistics

Reach your goals faster

Subscribe and unlock full access to the AI trainer.

Full feature access
All app features without limitations
Unlimited AI workouts
Any number of workout sessions
AI workout plans
Adapted to your body and goals
Unlimited AI trainer chat
Ask any questions without limits
Yearly subscription
1 year
Best value
Save up to 60%
Monthly subscription
1 month
Try without commitment
Renews automatically
F/AI — AI fitness trainer

Start training
smarter

Download F/AI and get a personal AI trainer that knows your goals, body metrics, and limitations.

Download on theApp Store
Get it onGoogle Play