Trailstation

Trailstation turns your own audio into a “station” that loops pinned to the wall clock. Because every device computes the same spot in the loop from the current time, two phones — or a whole group on a hike — that tune into the same station hear the same moment, to the second. No host, no setup, no network.

Build a station from audio you import, tune in, and share it with friends — by AirDrop, email, or an iCloud link. Group your stations into folders and search across tracks and artists as your library grows. On a long trip with no signal, you can sync your station clock to a nearby device, directly device-to-device, so you stay perfectly in time. It also runs on Apple Watch.

Private by design. No accounts, no analytics, no tracking — your audio and stations stay on your device. It plays fully offline. Two optional features connect only when you start them: syncing your clock to a nearby device over the local network (device-to-device, no internet, no servers), and the iCloud link you choose to create when sharing a station.