PHNTM One
Private AI on your desk that tutors math and guides projects
2 followers
Private AI on your desk that tutors math and guides projects
2 followers
A private AI assistant you own. A Raspberry Pi 5 with a 10.1" touchscreen runs its model (Gemma 3 4B) on the device: chat, memory, reminders, voice in English, Italian and Spanish, and answers from your own documents, with the router unplugged. New: PHNTM Tutor, a math tutor that teaches how to find the answer and grades by exact arithmetic, with a Parent view; and PHNTM Missions, eight starter projects with steps and an honest record. $799 once, no subscription, hand-built to order.
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Hi Product Hunt, I'm Jacob. I build PHNTM One by hand, one unit at a time, from my desk in the United States.
I wanted an assistant that was actually mine: on my desk, remembering what I told it last week, without sending a word of it to someone else's computer. So I built one, and then I kept going. The two things I'm proudest of shipped this month:
PHNTM Tutor teaches a learner how to find the answer instead of handing it over. 52 linked skills across five subjects, lessons in English, Italian and Spanish. It grades with exact arithmetic and supported symbolic checks, never with the model, and there is no cloud fallback. The Parent view shows what was solved without help in Tutor and what needed help, with a printable weekly report.
PHNTM Missions gives you eight starter projects, from a birdhouse to a restored bicycle, each with milestones, ordered steps, materials, tools and what counts as done. Then it keeps an honest record: ticked on your word is "reported", a photo you confirm raises the step's grade, and hazard steps won't close without evidence. AI-written plans are not in this release.
What I'd like you to hold me to:
"Private" comes with a method, not a promise: Watch the Wire shows the assistant's own connections on the screen, and the help pages give you four checks with standard tools.
The numbers are measured and public, including the slow ones: on the review unit on October 30, warm answers had medians of 19 s to first words and 28 s to the complete answer; the first uncached question took 87 s and 94 s.
The full parts list, unedited transcripts and the owner manual are all on the website.
If I disappear tomorrow, local chat, memory, documents and voice keep working: there is no PHNTM cloud account or licence server. Updates and support would stop.
Who it's NOT for: if you want frontier-level reasoning or instant answers, use a cloud model. If you have a good GPU and like tinkering, run Ollama yourself; it's free and faster. This is for people who want the finished, private thing on a dedicated box.
There's an optional Boosted mode for hard questions, on your own Anthropic key and billed to you by Anthropic. It's off by default and every answer that left the device is labelled.
$799 once, made to order, burned in for 72 hours, ships worldwide. Ask me the hard questions.