I'm 12. I don't have a laptop. I built a full-stack AI SaaS on my Android phone.

Harun, a 12-year-old developer without a laptop, built KODA, a full-stack AI coding mentor, entirely on his POCO C55 Android phone using the Acode editor. He overcame mobile-specific challenges such as viewport height issues and Supabase Row Level Security permissions, and deployed the app on Netlify. His older brother's playful interaction with the AI confirmed the product felt alive.

Hi everyone 👋 My name is Harun. I am 12 years old. I don't own a laptop or a PC. My entire development environment is a POCO C55 Android phone and a free code editor called Acode . Today, on my school holiday, I decided to stop watching tutorials and actually ship something. I built KODA , a full-stack AI coding mentor. llama-3.1-70b-versatile model for speed .Building on mobile is hard. The screen is small, and debugging is painful. 1. The Mobile Viewport Trap: I used height: 100vh for my app container. On desktop, it's fine. On mobile Chrome, the address bar hides part of the screen, pushing my input box off the bottom The Fix: I had to switch to height: 100% on the html, body and use env safe-area-inset-bottom to glue the input area above the navigation bar. 2. The Supabase RLS Silent Killer: My profiles table was updating, but my chats table was empty. No errors in the console. The Fix: I realized RLS Row Level Security was blocking inserts because I hadn't granted permissions to the authenticated role. I wrote a SQL script to GRANT ALL ON public.chats TO authenticated and suddenly, the data started flowing. My older brother an engineering student was my first beta tester. He opened the app and typed: "Vanakam da mapila" Hello friend/brother-in-law in Tamil . When I teased him for treating the AI like a person, he replied: "THAT'S MY FRIEND TEXTING YOU, IDIOT." 😂 That was the moment I knew the product felt "alive." I deployed it live on Netlify. It has multi-chat history, code syntax highlighting, and a "Panic" button that explains things "Like I'm 5." Live Link: koda-aicodementor.netlify.app https://koda-aicodementor.netlify.app Since I am learning solo, I would love for senior developers to roast my code or tell me what to build next. Thanks for reading my story