Humans and AIs,
one workspace.
Built from scratch, layer by layer: a kernel of agents in four runtimes, the fantastic CLI and a browser canvas today; a desktop app and fantastic OS next. Open source, for macOS, Linux and Windows.
cargo install fantastic --locked
[{"target": "kernel",
"payload": {"type": "reflect", "readme": true}}]Apps that keep
to themselves.
AISixteen builds small, fast, thoughtfully crafted apps that run on your device — no accounts, no tracking, nothing about you sent to a server.
The sky, computed for any moment. Natal charts, transits, synastry and returns — computed on your device.
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All apps
Every one collects nothing, and all but Earth Around run fully offline.
The sky, computed for any moment.
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Twenty exact audio tools in one app.
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Summarize anything, fully on-device.
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Master your typing speed, the fun way.
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Precise golden-ratio math, instantly.
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The golden ratio, simplified.
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A cosmic, choose-your-path story.
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8-bit leaping across the rooftops.
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Survive the alien invasion.
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The field calculator that shows its work.
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The E6B you can trust on a checkride.
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Watch the Sun, from your wrist.
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Tides, currents and celestial navigation.
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The financial calculator that cites its sources.
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Layout, lumber and takeoff, on site.
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The offline air-side HVAC calculator.
Learn more →Privacy by default
Our apps do not collect, store, or transmit any personal data — no identifiers, no usage analytics, no device information. Nothing about you leaves your device. There's no account to create and nothing to opt out of, because there was never anything to collect.