Gyroid

A coding agent for iPhone with a real Linux inside.

Features

The agent

Several chats at once, each with its own model, system prompt and working folder.
Permission modes per chat: Auto, Accept Edits or No Restrictions.
File changes as diffs.
Your own MCP servers, prompt templates and compaction settings.
Your provider and your keys: Anthropic, any OpenAI-compatible endpoint, OpenCode Go and Zen.
Split view on iPhone Duo.

The Linux

gyroid-vm, our own aarch64 Linux engine.
Alpine and Debian support.
Python with pip and venv, Node.js with npm, git and curl over HTTPS, gcc on Debian.
SQLite, PostgreSQL, MariaDB, Redis and Valkey.
pandoc, ffmpeg, ImageMagick, tesseract and headless LibreOffice.
zip, 7-Zip and tar with gzip, xz and zstd.

Fast where it counts

An agent rarely runs one long program. It runs hundreds of short ones, like ls, git status, grep, a test or a package install, and each of those forks, execs and makes a pile of stat and open calls. We rebuilt that path first, and it's where gyroid-vm is furthest ahead of iSH-AOK. Fewer CPU seconds per command means a task finishes sooner and uses less battery.

Work iSH-AOKgyroid-vm, time for the same work Faster

System calls

stat a file7.3 µs vs 130.5 µs 18×

open and close16.4 µs vs 158.7 µs 9.7×

Commands an agent runs

tar a tree, untar it0.76 s vs 1.95 s 2.6×

find over the Python stdlib0.18 s vs 0.42 s 2.3×

sh -c, 200 times0.19 s vs 0.43 s 2.2×

fork and exec, 300 times0.21 s vs 0.44 s 2.1×

Databases

Redis SET over TCP18.5k vs 2.2k requests/s 8.3×

PostgreSQL pgbench719 vs 149 transactions/s 4.8×

Programs

Lua1.22 s vs 1.65 s 1.35×

Python1.08 s vs 1.25 s 1.16×

Same Alpine 3.24 userland on both engines, best of three interleaved runs.

What comes next

1Shipped
Our own Linux engine
gyroid-vm, written from scratch.
2In progress
Built for agents
The engine and the terminal are our own, tuned for how an agent works: lots of short commands and constant file reads.
3Next
TestFlight beta
Sign up below to get an invite.
4Planned
SIMD speed
Faster image, media and compression work.
5Planned
Screen: graphical Linux apps
A Wayland compositor inside Gyroid, shown in the app over VNC.
6Planned
Background and system
Longer tasks in the background, Shortcuts actions, iCloud sync for chats.
7Considering
Ubuntu
A third Linux environment.