Building My First SaaS: AI Gym Bro

Building AI Gym Bro has been one of the most rewarding experiences of my developer journey. What started as a simple idea—an AI that could help people with their fitness goals—turned into a full-fledged SaaS product that I'm incredibly proud of.

The Spark of an Idea

It all began when I noticed how many people struggle to stay consistent with their workouts. They either don't know where to start, get bored with their routines, or simply lack the motivation to keep going. I thought, "What if there was an AI that could be your personal gym buddy—always available, always encouraging, and always adapting to your needs?"

The Tech Stack

For AI Gym Bro, I chose a modern stack that would allow for rapid development while maintaining high performance:

Next.js for the frontend and API routes
TypeScript for type safety across the codebase
Tailwind CSS for rapid UI development
OpenAI API for the conversational AI capabilities
Vercel for seamless deployment and hosting

Challenges Along the Way

Building a SaaS isn't just about coding—it's about solving real problems for real people. Some of the biggest challenges I faced included:

Prompt Engineering: Getting the AI to give consistent, helpful, and safe fitness advice took countless iterations
User Experience: Making the interface intuitive enough that users could get value within seconds of landing on the site
Performance: Ensuring fast response times even with AI-generated content

Lessons Learned

This project taught me invaluable lessons about product development:

Start small, iterate fast: My first version was extremely basic, but it helped me validate the idea quickly
Listen to users: Every piece of feedback is gold. Users showed me features I never would have thought of
Ship imperfect: Waiting for perfection is the enemy of progress. Launch, learn, improve

What's Next?

AI Gym Bro is just getting started. I'm working on features like personalized workout plans, progress tracking, and integration with fitness wearables. The goal is to make it the ultimate AI fitness companion that helps everyone achieve their health goals.

If you haven't tried it yet, check it out at aigymbro.web.id