Multi-Sport Endurance Training App
Budget: $750 – $1,500 USD
I am building an AI-powered performance and coaching platform for endurance athletes, coaches, and training teams.
The product is designed for runners, cyclists, and triathletes, combining customized training plans, athlete data integrations, AI-assisted coaching, recovery analysis, race preparation, nutrition, blood work, body composition, and coach/athlete management in one platform.
The goal is not to build another simple fitness tracker or generic social fitness app. The goal is to create a coaching operating system for endurance sports, where athletes receive personalized training guidance and coaches can manage their athletes more efficiently using real performance data and AI-assisted insights.
The platform should connect and organize athlete data from sources such as Strava, Garmin, Apple Health, Health Connect, and other health/performance platforms. Based on this data, the system should help coaches and athletes analyze training load, recovery, readiness, progress, fatigue risk, race preparation, nutrition needs, blood work, and body composition.
The platform already has an existing foundation, and I am looking for an experienced developer to help improve, stabilize, refine, and continue building the product toward a closed beta launch.
Core Product Vision
The product will serve two main users:
1. Athletes
Athletes will use the app to receive personalized training plans for running, cycling, and triathlon, track progress, understand recovery, prepare for races, receive AI-assisted recommendations, and communicate with their coach or training team.
2. Coaches / Training Teams
Coaches and endurance training teams will use the platform to manage athletes, review performance metrics, generate and adjust training plans, monitor fatigue and risk, analyze adherence, review health data, and provide better feedback using AI-assisted insights.
The AI should act as a copilot for the coach, not a replacement. It should help analyze data, suggest adjustments, summarize athlete status, and support training-plan creation, while allowing the coach to review and approve key decisions.
Key Features
Athlete App
Personalized training plans for running, cycling, and triathlon
Training plan customization based on:
Fitness level: beginner, intermediate, advanced
Specific goals: weight loss, speed improvement, distance training, race preparation
Available time per week
Race date and target event
Training history
Recovery and readiness data
Injury history or limitations
Daily training recommendation: “What should I do today?”
Adaptive training-plan adjustments based on missed sessions, fatigue, poor sleep, high load, or upcoming race
Recovery and readiness dashboard
Nutrition and fueling guidance
Race week planning
Blood work and body composition tracking
AI Coach chat and insights
Integration with Strava, Garmin, Apple Health / Health Connect
Simple, intuitive, premium user experience
Coach / Team Dashboard
Coach dashboard to manage multiple athletes
Athlete list with status indicators: ok, attention needed, fatigue risk, inactive
Individual athlete profile with:
Recent activities
Training adherence
Training load
Recovery trends
Sleep, HRV, resting heart rate and other health metrics
Race goals
Body composition
Blood work data
Notes and feedback
AI-generated weekly athlete summaries
AI-assisted training-plan builder
Training-plan review and approval workflow
Smart alerts for coaches:
Missed key sessions
Training load spikes
Fatigue risk
Poor recovery
Race approaching
Unusual health/performance changes
Coach-to-athlete communication tools
Ability to assign, edit, and adjust training plans
AI-Assisted Coaching
Generate customized training plans based on athlete profile and goals
Analyze training data from connected platforms
Suggest plan adjustments based on recovery, fatigue, adherence, and progress
Summarize athlete status for the coach
Identify risk signals and performance trends
Help interpret blood work and body composition data in a safe, educational way
Provide explainable recommendations, not generic chatbot responses
Example:
“This athlete completed 5 out of 6 planned sessions this week, increased training load by 18%, had a drop in HRV, and reported poor sleep. Suggested adjustment: reduce intensity tomorrow and keep the next session in Zone 2.”
Current / Planned Tech Stack
The platform currently includes or is planned around:
Next.js / React / TypeScript
Tailwind CSS
Supabase
Flutter mobile app
AI API integration
Stripe
Strava integration
Garmin / wearable data integrations
Apple Health / Health Connect
Coach dashboard
Athlete app
Training plan modules
Nutrition, recovery, readiness, and performance modules
What I Need Help With
I am looking for a developer who can help with:
Reviewing the existing codebase and architecture
Improving and stabilizing the web and mobile product
Building and refining the coach dashboard
Improving the athlete onboarding flow
Building customized and adaptive training-plan workflows
Implementing training-plan logic based on user inputs and performance metrics
Integrating and organizing athlete data from multiple sources
Helping implement AI-assisted coaching features
Improving UX/UI, performance, reliability, and production readiness
Preparing the product for a closed beta launch
Helping prioritize features and build with a strong product mindset
Ideal Candidate
The ideal candidate should have:
Strong full-stack development experience
Experience with React, Next.js, and TypeScript
Experience with Supabase or similar backend/database tools
Mobile app development experience
Flutter experience is a strong plus
Experience with AI APIs is a strong plus
Experience building fitness, health, wearables, coaching, or data dashboard products is a major plus
Understanding of endurance sports, training plans, running, cycling, or triathlon is a major plus
Good UI/UX sensibility
Ability to implement customization logic based on user inputs and athlete data
Strong product thinking, not just coding ability
Comfort working with an early-stage startup/product
What I Am Looking For
I am looking for someone reliable, proactive, and able to think like a product partner.
This is not just a one-time bug-fix project. If the collaboration works well, this can become a long-term development role.
The right person should be able to help turn the current platform into a polished, user-friendly, and effective training and coaching solution for endurance athletes and coaches.
The product is designed for runners, cyclists, and triathletes, combining customized training plans, athlete data integrations, AI-assisted coaching, recovery analysis, race preparation, nutrition, blood work, body composition, and coach/athlete management in one platform.
The goal is not to build another simple fitness tracker or generic social fitness app. The goal is to create a coaching operating system for endurance sports, where athletes receive personalized training guidance and coaches can manage their athletes more efficiently using real performance data and AI-assisted insights.
The platform should connect and organize athlete data from sources such as Strava, Garmin, Apple Health, Health Connect, and other health/performance platforms. Based on this data, the system should help coaches and athletes analyze training load, recovery, readiness, progress, fatigue risk, race preparation, nutrition needs, blood work, and body composition.
The platform already has an existing foundation, and I am looking for an experienced developer to help improve, stabilize, refine, and continue building the product toward a closed beta launch.
Core Product Vision
The product will serve two main users:
1. Athletes
Athletes will use the app to receive personalized training plans for running, cycling, and triathlon, track progress, understand recovery, prepare for races, receive AI-assisted recommendations, and communicate with their coach or training team.
2. Coaches / Training Teams
Coaches and endurance training teams will use the platform to manage athletes, review performance metrics, generate and adjust training plans, monitor fatigue and risk, analyze adherence, review health data, and provide better feedback using AI-assisted insights.
The AI should act as a copilot for the coach, not a replacement. It should help analyze data, suggest adjustments, summarize athlete status, and support training-plan creation, while allowing the coach to review and approve key decisions.
Key Features
Athlete App
Personalized training plans for running, cycling, and triathlon
Training plan customization based on:
Fitness level: beginner, intermediate, advanced
Specific goals: weight loss, speed improvement, distance training, race preparation
Available time per week
Race date and target event
Training history
Recovery and readiness data
Injury history or limitations
Daily training recommendation: “What should I do today?”
Adaptive training-plan adjustments based on missed sessions, fatigue, poor sleep, high load, or upcoming race
Recovery and readiness dashboard
Nutrition and fueling guidance
Race week planning
Blood work and body composition tracking
AI Coach chat and insights
Integration with Strava, Garmin, Apple Health / Health Connect
Simple, intuitive, premium user experience
Coach / Team Dashboard
Coach dashboard to manage multiple athletes
Athlete list with status indicators: ok, attention needed, fatigue risk, inactive
Individual athlete profile with:
Recent activities
Training adherence
Training load
Recovery trends
Sleep, HRV, resting heart rate and other health metrics
Race goals
Body composition
Blood work data
Notes and feedback
AI-generated weekly athlete summaries
AI-assisted training-plan builder
Training-plan review and approval workflow
Smart alerts for coaches:
Missed key sessions
Training load spikes
Fatigue risk
Poor recovery
Race approaching
Unusual health/performance changes
Coach-to-athlete communication tools
Ability to assign, edit, and adjust training plans
AI-Assisted Coaching
Generate customized training plans based on athlete profile and goals
Analyze training data from connected platforms
Suggest plan adjustments based on recovery, fatigue, adherence, and progress
Summarize athlete status for the coach
Identify risk signals and performance trends
Help interpret blood work and body composition data in a safe, educational way
Provide explainable recommendations, not generic chatbot responses
Example:
“This athlete completed 5 out of 6 planned sessions this week, increased training load by 18%, had a drop in HRV, and reported poor sleep. Suggested adjustment: reduce intensity tomorrow and keep the next session in Zone 2.”
Current / Planned Tech Stack
The platform currently includes or is planned around:
Next.js / React / TypeScript
Tailwind CSS
Supabase
Flutter mobile app
AI API integration
Stripe
Strava integration
Garmin / wearable data integrations
Apple Health / Health Connect
Coach dashboard
Athlete app
Training plan modules
Nutrition, recovery, readiness, and performance modules
What I Need Help With
I am looking for a developer who can help with:
Reviewing the existing codebase and architecture
Improving and stabilizing the web and mobile product
Building and refining the coach dashboard
Improving the athlete onboarding flow
Building customized and adaptive training-plan workflows
Implementing training-plan logic based on user inputs and performance metrics
Integrating and organizing athlete data from multiple sources
Helping implement AI-assisted coaching features
Improving UX/UI, performance, reliability, and production readiness
Preparing the product for a closed beta launch
Helping prioritize features and build with a strong product mindset
Ideal Candidate
The ideal candidate should have:
Strong full-stack development experience
Experience with React, Next.js, and TypeScript
Experience with Supabase or similar backend/database tools
Mobile app development experience
Flutter experience is a strong plus
Experience with AI APIs is a strong plus
Experience building fitness, health, wearables, coaching, or data dashboard products is a major plus
Understanding of endurance sports, training plans, running, cycling, or triathlon is a major plus
Good UI/UX sensibility
Ability to implement customization logic based on user inputs and athlete data
Strong product thinking, not just coding ability
Comfort working with an early-stage startup/product
What I Am Looking For
I am looking for someone reliable, proactive, and able to think like a product partner.
This is not just a one-time bug-fix project. If the collaboration works well, this can become a long-term development role.
The right person should be able to help turn the current platform into a polished, user-friendly, and effective training and coaching solution for endurance athletes and coaches.