Glosso Studio
An Android language course that grades your pronunciation one sound at a time, in English and Russian. Free during the open beta; scoring runs in the cloud or, optionally, on your phone.
Work
Products I have designed, built and shipped: pronunciation grading, public transport, an on-device voice assistant and computer vision in the browser.
TransitOS
An open-source Android transit app for Metrovalencia: live arrivals, trip planning and an interactive network map. No ads, no tracking, and a provider architecture so any operator can be added without touching the app.
EdgeMind
An Android voice assistant running Gemma 4 with native audio and tool calling, entirely on the phone. No cloud, no account, no telemetry.
CountIn
Real-time people counting with computer vision that runs entirely in the browser: a from-scratch tracker and line-crossing geometry, no server.
Also on the blog
- TagMod A broken e-reader turned into a one-button Kindle and an always-on e-ink dashboard. Open source.
- Tagus brick recovery Breaking a recovery boot loop over UART, with no ADB and a USB-UART adapter.
- Android apps on Asahi Linux Running aapt2 through QEMU so Android development works on Apple Silicon Linux.
Tell me what you're building.
I read every email myself and reply within a few days. Products, collaborations, Android or on-device AI work, or just a coffee in Valencia.