An independent iOS studio
Free offline navigation apps for iPhone and Apple Watch — nautical charts and sea maps for sailors, an anchor drag alarm that watches all night, topographic hiking maps and a GPS altimeter with barometer. Sensor-driven, privacy-first, and tested where the signal runs out.
The collection
Each app is built around a single job done exceptionally well — and every one keeps working when the bars disappear. Real screenshots, straight from the App Store.
// detailed sea charts · AR waypoints · live weather
High-detail nautical charts with depth contours, harbours, anchorages, buoys and lighthouses. An AR navigator paints your destination as a beacon on the live camera, routes plan turn-by-turn, and up to 2 GB of tiles are cached so the chart never goes blank offshore.
// kalman-filtered drift alarm · offline · critical alerts
A silent watchkeeper that never blinks. Drop the hook, set a safety radius, and the moment you drag past it the alarm fires loud enough to wake a closed cabin — bypassing silent mode. Kalman filtering kills the 3 a.m. false alarms that plague other apps, and it works with no signal, anywhere.
// altimeter · barometer · compass · AI trail guide
Precise altitude in metres or feet, atmospheric pressure, compass, sunrise & sunset and a barometer-based forecast — all from the iPhone's own sensors, fully offline. An AI assistant reads your context (the screenshot you see was taken in Tijarafe, La Palma) and suggests what to do nearby. Five home-screen widgets included.
// openstreetmap · offline tiles · turn-by-turn
Detailed, community-built topographic maps for hikers, mountaineers and bikers — six open-source layers rendered live, with disk cache and offline pre-download so a forgotten paper map is never a problem. New maneuver engine for turn-by-turn directions, plus a full Apple Watch app with workout recording and Digital Crown zoom.
// push-to-talk · peer-to-peer · global FM radio
Turn an iPhone into a portable radio station. Talky links nearby devices directly over encrypted peer-to-peer — no internet, no SIM — with low-latency push-to-talk, an interactive sonar radar of who's in range, and up to eight simultaneous connections. When you are online, a global FM radio streams thousands of stations. Now with macTalky, a native Mac field-radio console. Open source.
// ai chat · live weather · hikes · plants
An AI assistant that talks like an islander. AVO AI reads your location, the time of day and the live weather to suggest hikes, bike rides, restaurants and quiet places nearby, identifies plants from a photo and answers anything about the Canaries in six languages, plus a Palmero mode that speaks like a local. Free, no account.
How we build
The same four rules run through every app we ship. They are the reason our instruments still work when everything else asks you to sign in.
Charts, tiles, altimeter and alarms run on the device's own sensors and cached data. The job gets done where there is no signal at all.
No account, no hidden tracking, no GPS data sold. Your position stays on your iPhone. You decide what — if anything — you ever share.
Maps come from OpenStreetMap, weather from Open-Meteo — keyless and free. Honest, community sources instead of a wall of API contracts.
A shared design language — the morphing header you see up top — runs across iPhone, iPad, Apple Watch and Mac, tuned for sun-readable contrast.
Why La Palma
La Palma drops straight from the Atlantic to the 2,426 m rim of the Caldera de Taburiente — a UNESCO Biosphere Reserve and one of the world's first Starlight Reserves, home to the observatories at Roque de los Muchachos. Sea level to summit, harbour to night sky. It's the perfect proving ground, and it's exactly the vertical range our apps were made to cover.
Take one with you
Free to start, no account, no signal required. Pick the instrument for your next edge of the map.
