Phone-based safety net

The invisible line home.

Schedule check-ins with your loved ones. Tap to acknowledge. If you go silent, the right people are notified — in the right order, at the right time.

Start a trip How it works
$0Your phone
7d+Phone battery
30sSet up

Three steps. No hardware.

Every hiker tells someone their route. Every parent says "text me when you get there." We just made it automatic — for the trail, the peak, the crag, the water, the road.

01 — Plan

Tell us who to notify.

Add your spouse, your mom, a friend — up to a handful of contacts. Each gets their own escalation tier: try-calling first, emergency second, full alert last.

02 — Check in

A tap. That's it.

Every hour or two, the app asks you to check in. Tap the green button. Or just move — any position ping counts as implicit check-in. Takes two seconds.

03 — Or don't

Silence triggers the alert.

If you go quiet past your window, we notify your people automatically. Email. SMS. In escalating severity. With your last-known position and a live tracker link.

Different from a satellite beacon.

Magna Tether covers the 80% of trips where you've got cell or wifi at some point in the day. For true off-grid — deep backcountry, offshore, alpine — carry a PLB too.

Satellite beacon

$400 device + $30/mo
  • Works anywhere — including the deep ocean
  • Press a button when in trouble (if you can)
  • Dedicated hardware you carry
  • 14-day battery in tracking mode
  • Doesn't notice if you're unconscious or lost the device

Magna Tether

$0 device · free beta
  • Works wherever your phone has cell or wifi
  • Notices automatically when you stop being fine
  • Uses the phone already in your pocket
  • Days of battery in check-in-only mode
  • Live tracker link your family can open from anywhere

Why we built it this way.

"Press this button if you're in trouble" only works if you're conscious, mobile, and holding the device. We flipped it. Magna Tether notices when you stop being fine — on its own.
— The reverse check-in model