The latest articles on DEV Community by Edwin Cruz (@ghostgainsai). https://dev.to/ghostgainsai https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3951394%2Fc2936bbd-bf99-4d8e-9b15-cf1971a426d7.jpg https://dev.to/ghostgainsai en Edwin Cruz Mon, 25 May 2026 21:05:09 +0000 https://dev.to/ghostgainsai/i-built-a-fitness-app-where-the-ai-roasts-you-for-eating-pizza-and-hypes-you-when-you-pr-4437 https://dev.to/ghostgainsai/i-built-a-fitness-app-where-the-ai-roasts-you-for-eating-pizza-and-hypes-you-when-you-pr-4437 <h2> The Problem with Every Fitness App </h2> <p>Every fitness app feels the same. Generic. Corporate. Bland.</p> <p>Log your food. Count your calories. Get a little confetti animation. Zero personality. Zero fire.</p> <p>I wanted something different — so I built <strong>Ghost Gains</strong>.</p> <h2> What Is Ghost Gains? </h2> <p>Ghost Gains is an AI-powered fitness tracker with a personality. The core idea: <strong>your AI actually reacts to what you do</strong>.</p> <ul> <li>Hit a new PR on bench? Ghost goes crazy hyping you up.</li> <li>Log a pizza at 11pm? Ghost roasts you (respectfully).</li> </ul> <p>It's the difference between a sterile wellness app and having a real training partner in your pocket.</p> <h2> The Tech Stack </h2> <ul> <li> <strong>Ghost AI</strong>: Llama 3.3 70B via OpenRouter — chat, roasting, hype responses</li> <li> <strong>Camera Scan</strong>: Gemini Vision API — point your camera at food, get instant macros</li> <li> <strong>Voice Mode</strong>: ElevenLabs — Ghost literally speaks to you</li> <li> <strong>Gamification</strong>: XP system, rank progression, day streaks</li> <li> <strong>Privacy first</strong>: All data on device. No cloud. No tracking.</li> </ul> <h2> The Roast Mode Hook </h2> <p>The feature getting the most reaction from testers: <strong>Roast Mode</strong>.</p> <p>When you log a cheat meal, Ghost responds. Never mean, always funny, always motivating underneath. People <em>want</em> accountability. They just don't want a robot doing it emotionlessly.</p> <h2> Where We're At </h2> <p>2,800+ warriors on the waitlist. Building toward full launch with exclusive rank badges and lifetime premium for early signups.</p> <p>Join the waitlist: <a href="https://ghost-gains--ghostgains37.replit.app/" rel="noopener noreferrer">https://ghost-gains--ghostgains37.replit.app/</a></p> <p>Happy to answer questions about the tech, the build, or the AI routing architecture.</p> ai llm showdev sideprojects