We make games, apps and typefaces.

Partech Systems is a small independent studio. We ship our own products, and we use AI where it genuinely helps: on your phone, one job at a time, and we show how it's built.

New · play Rattle now
Rattle title screen, a diner sign with two tumbling dice above "Words served all day"
Free, right in your browser. No download.
Game Studio

9 small games. Pick one and play.

Short, calm games for a spare minute. Every one plays free in your browser, with nothing to install. Rattle is up top; here are the rest.

All 9 games
App Studio

Apps for everyday reading.

Hindu Prayers opens with the day's deity and prayer in seven Indian languages. Uncrease turns PDFs and books into text that fits your phone. Plain, in development, explains the official letters nobody enjoys reading.

Get it on Google Play All apps
The Today screen of Hindu Prayers
Type Foundry

8 typefaces. Try them here.

Sans, serif, slab, condensed, rounded and coding fonts, each with a variable weight axis, hinting for small sizes and every European language.

See all typefaces Licensing
Quiet fox, bright code
How we build with AI

We use AI where it genuinely helps, and write down what we learn.

Thirty years of putting research into systems people rely on. These are the notes we'd want to read before building with AI: how to tell if it works, how it quietly gets worse, and why a small model on your phone is often enough.

The only question I ask in an AI demo

There's one question I ask in every AI demo, and it ends about half of them. Not because the answer is bad — because there isn't one, and nobody had noticed.

Small models, big deal

Everyone's watching the frontier-model leaderboard. Meanwhile the most useful work I've shipped this year runs on an 8B model that fits on a phone and never phones home.

RAG done right: it's a search problem, not an AI problem

Most RAG projects underperform for the same reason — the team treated retrieval as an AI problem when it was a search problem all along. The model was never your weak link.

It was fine in March

AI systems don't fail loudly. They get quietly worse while every dashboard stays green, and you find out from a customer. Here's what to watch instead, and which signal is worth more than all the others.
Journal

Notes from the studio

Read all articles →
Five phrases that hide a deadline in an official letter
· Bhaskar Paratey

Five phrases that hide a deadline in an official letter

The date you need is often not in the first paragraph, and sometimes not a date at all. Five phrases in official letters that quietly set a deadline, and what each one really means.
We're building Plain
· Bhaskar Paratey

We're building Plain

Official letters are written for the people who send them. We're building an app for the people who receive them. Here's what Plain is, what it isn't, and why it isn't finished.
The customer is the daughter, not the mother
· Dimple Paratey

The customer is the daughter, not the mother

Almost every AI product sold for older people is really sold to their adult children. Once you notice that, you can't unnotice it — and it explains why so much of it feels wrong to the person it's aimed at.