I Built an AI Coding Mentor on a $150 Phone for My Friend Who Couldn't Afford a Laptop

Description and use

A web‑based AI coding mentor, KODA, runs entirely in the browser on a cheap Android phone, enabling a user without a laptop or paid tools to learn coding and debug errors.

Problem

A friend lacked a laptop, fast Wi‑Fi, and money for paid AI tools but wanted to learn coding.

Outcome

The friend successfully debugged a Python script using KODA without needing the author’s help or searching online for 40 minutes.

Workflow

• Open the KODA web link on the phone
• Type a question or upload a screenshot of an error
• The AI processes the input and returns a plain‑language explanation or fix
• If unsure, the AI refuses to answer instead of hallucinating

Evidence

it's a web-based AI coding mentor that runs entirely in the browser. no downloads. no accounts. no credit card.

Source

under the hood, it uses a constitutional AI framework with 10 articles that prevent hallucinations and enforce safety. if the AI isn't sure, it refuses to answer rather than guessing.

Source

my friend used it last week to debug his first Python script. he didn't need to ask me. he didn't need to google for 40 minutes. he just snapped a photo of the error and KODA walked him through it.

Source