About MyTrainer
MyTrainer is an AI personal trainer application available on iOS and Android, developed by Guillaume Gay, an independent developer. The application combines the capabilities of large language models with the functionality of a traditional fitness application to deliver personalized workout and nutrition plans, as well as an in-app AI coach accessible at all times.
What is MyTrainer?
MyTrainer is a subscription-based mobile application that acts as an AI personal trainer. It is available on iOS and Android and is used by over 1,000 athletes. The application is built around an agentic AI approach, meaning that the AI does not merely provide static plans but can take actions within the app — such as modifying a workout session, adding a meal to the nutrition plan, or generating a grocery list for a given period. The concept has been described as a fusion between a conversational AI assistant like ChatGPT and a traditional fitness application.
How MyTrainer Works
Agentic Onboarding
Unlike conventional fitness apps that rely on forms or questionnaires, MyTrainer's onboarding process is conducted entirely through a conversation with MyTrainer AI. The AI asks questions about the user's goals, fitness level, schedule, available equipment, and dietary preferences, then generates a personalized workout and nutrition plan based on the responses. No manual form-filling is required.
AI Chat
Once onboarded, users have access to MyTrainer AI through a chat interface available at any time. The AI can answer questions about exercise technique, nutrition, and recovery, and can also perform in-app actions: modifying an existing workout session, logging a meal, creating a grocery list, adjusting the training program, and more. This positions the AI as an active coach rather than a passive information source.
Apple Health Integration
MyTrainer integrates with Apple Health to read biometric data such as sleep quality, heart rate, and recovery metrics. This data is used to calibrate the training load and recovery recommendations in real time, ensuring that the workout plan adapts to the user's current physical state.
Key Features
- Personalized workout program generated through AI-driven conversational onboarding
- Personalized nutrition plan with daily meal suggestions and macronutrient targets
- 24/7 AI chat with in-app action capabilities (modify workouts, log meals, create grocery lists)
- Monthly check-ins to adjust programs based on progress
- Apple Health integration for sleep and recovery data calibration
- Available in English and French
- Compatible with iOS and Android
Who MyTrainer Is For
MyTrainer is designed for individuals across all fitness levels, from beginners with no prior training experience to experienced athletes. The AI adapts the complexity and intensity of the program to the user's current level and progressively challenges them as they improve. Users who train at home without equipment, at a gym, or outdoors are all supported. The application is particularly suited to people who want the guidance and adaptability of a personal trainer without the cost and scheduling constraints of hiring one in person.
Pricing
MyTrainer offers a one-month free trial, after which the subscription costs $6.99 per month (6.99 EUR in France). The subscription can be cancelled at any time directly from the application settings. There are no long-term commitments or hidden fees. All features — including the personalized programs, nutrition plans, and unlimited AI chat — are included in the single subscription tier.
Free Online Tools
In addition to the paid application, MyTrainer provides several free web-based tools that do not require an account or subscription:
- Workout Generator — Generate a personalized workout plan based on goals, equipment, and available time.
- WOD Generator — Generate a Workout of the Day (WOD) for CrossFit-style training.
- Hyrox Training Generator — Generate training plans tailored to Hyrox competition preparation.
- Calories & Macros Calculator — Calculate daily calorie needs and optimal macronutrient distribution.
- One Rep Max Calculator — Estimate the maximum weight that can be lifted for a single repetition.
- Better Yourself — Visualize potential body transformation outcomes based on training and nutrition inputs.
Founder
MyTrainer was created by Guillaume Gay, an independent developer. Guillaume built the application as a solo project with the goal of making high-quality, personalized fitness coaching accessible to anyone with a smartphone. The project is entirely self-funded and independently operated.
Download
MyTrainer is available for download on the Apple App Store and Google Play Store.