Available for projects · Spain

I build apps and
AI that lives on your device

Indie developer. Six apps shipped on the App Store, a cognitive engine written in Rust, and one obsession: your data should never leave your pocket.

0apps on the App Store
100%on-device AI
$0cloud bill: everything local
Rust + Swiftfrom engine to interface

My apps

Six ways to use your phone without giving your data away. Open any of them — and if you're into tech, each one hides a "for the curious" section with its inner workings.

SyntheticMind

SyntheticMind

Your AI. 100% private. · Flagship project

Would you tell your secrets to an AI that reports everything to a server? This one can't: it lives entirely inside your iPhone and works even in airplane mode. It answers Spanish legal questions with the actual text of the law, reads your documents, and shows the sources behind every answer. You can also try it right in your browser.

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NeuroVocal Studio

NeuroVocal Studio

Voice analyzer · ★★★★★

Your voice says more than you think. It analyzes any audio or video and gives you a clear verdict — without your voice ever leaving your phone.

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VoiceCoachAI

VoiceCoachAI

Intuitive voice coach

Hear yourself before that interview or difficult conversation: speak for a few seconds and it tells you how you sound, like a coach would.

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NeoBlob

NeoBlob

Psychedelic chill game · Free

Five minutes of calm: a ball of light that follows your finger, chill music and levels that feel like little journeys. You can't lose.

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NeonPulse

NeonPulse

Drag. Merge. Evolve. · Free

Looks easy: merge pieces until only one is left. The catch — the first solution you see almost never works. That's what hooks you.

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Salón Recreativo

Salón Recreativo

Seventeen machines. One coin. · Free

A whole arcade in your pocket: seventeen machines, each with its cabinet, its lit marquee and its high-score table. Green phosphor for the eighties ones, colour for the later ones, and a chip that synthesises the music live.

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Earth Twins

Earth Twins

Web tool · Opens in your browser

Of NASA's 6,336 confirmed exoplanets, how many are genuinely like Earth? Fourteen. Seven published criteria, the SQL query behind each one in plain sight so you can verify it at the source, and the habitable zone computed star by star — because it is not in the same place for all of them.

Explore the catalogue

Services

Everything I do for my own products, for your project.

🧠

Private AI for your business

AI assistants that work on your data without it ever leaving your company: RAG over your own documents, source verification and local execution. Ideal for legal, healthcare and government.

📱

iOS app development

From idea to the App Store: design, Swift, on-device AI, optimization and publishing. Six shipped apps of my own back the whole process.

AI websites with zero servers

The AI runs in the user's browser (WebGPU + WebAssembly): no servers to pay for, no data to safeguard.

📊

Open data & automation

Ingesting public data (official gazettes, open-data portals, public APIs) and turning it into useful products: search tools, assistants, automated reports.

See an example: 6,336 NASA exoplanets →

Let's talk

Tell me your idea and I'll tell you how I'd build it — no strings attached.

Email me