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Show HN: an app to develop an intuitive sense of North using spatial audio

https://contact.ms/compass/
2•ms0•6h ago

Comments

ms0•5h ago
Inspired by sensory augmentation projects like NorthSense/North Paw (wearable devices that vibrate in the direction of North), by cultures that navigate using cardinal directions ("south" instead of "to your left"), and the idea of active inference I wanted to see if I could gain a similar intuitive sense of orientation using just spatial audio cues from my phone. People who used North Paw say that while using it, they had a sense of north and navigated better; but once they stopped, they lost the sense, and their navigation skills were back to baseline. So I thought that I don't want the app to tell me where's north; I want it to make me predict north, and correct me when I'm wrong.

I started with a webapp, but it couldn't run in the background, so I (or, well, little helpful shoggoths: Claude, Gemini, & Codex) built a native iOS app instead. The core functionality is simple: every few seconds (configurable), it makes a subtle cue sound, and one second later, it plays a short sound coming precisely from the direction of North using spatial audio (headphones required). After a couple of weeks, I found I could instinctively sense North, including when the app wasn't running. It's definitely not magic: if I teleport somewhere (i.e., use the tube), I normally need to look at the compass once to start tracking it again; but it still feels like I've acquired a new sensory modality.

The app also supports vibration mode (for discreet haptic pulses when you're facing North), runs unobtrusively in the background without affecting your music or podcasts, and can be calibrated to offset the phone being at an angle in your pocket.

I now usually know the direction of North instantly without actively thinking; navigation feels genuinely easier and more intuitive. It's probably most beneficial in areas without strict street grids (like most of Europe) than in the US, though.

The source code of the app is on GitHub, and the app is on the App Store.

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