CodeTrain vs PHNTM One

CodeTrain is a Socratic AI coding tutor: it asks questions, reviews what you write, and runs your tests, but never writes the code for you. Free to start.

A private AI assistant appliance that lives on your desk. Raspberry Pi 5 running Gemma 3 4B on-device, no cloud, no account, no subscription. $549, made to order, ships...

About CodeTrain

CodeTrain is a Socratic AI coding tutor: it asks questions, reviews what you write, and runs your tests, but never writes the code for you. Free to start. Two steps, about a minute, and the first one is going to catch you. The tutor's replies are pre-recorded, so it knows the handful of ways this lesson usually goes wrong. The real one reads whatever you actually wrote, and it is free for ten lessons a month.

About PHNTM One

A private AI assistant appliance that lives on your desk. Raspberry Pi 5 running Gemma 3 4B on-device, no cloud, no account, no subscription. $549, made to order, ships within 7–10 business days after payment. Every other AI sends your words to someone else's computer. PHNTM One is a small Linux computer with a real AI assistant built in. An assistant that sits on my desk, knows how I work, remembers what I told it last week, and helps me get through the day, without sending a word of it to someone else's computer.