The App

Your everyday screen

The Stasher companion app shows every coin you hold, builds transactions, and hands them to the device for approval. It talks to your Stasher X1 over USB — your keys never reach it, and it can never move funds on its own.

WindowsComing soonLinuxComing soon

Free, and works the same whether or not you bought your device from us. The app is useless without a Stasher X1 in your hand, which is the point.

How it works

From download to signed

  1. The Stasher download page open in a browser, with a Stasher X1 on the desk beside the laptop.

    Get the app

    Download the build for your platform from this page. No account, no sign-up, nothing to register.

  2. Hands plugging a USB-C cable into a Stasher X1 while the app lists available serial devices.

    Plug in over USB

    Connect the cable and the app lists the ports it can see. There is no wireless option because the device has no radio.

  3. The app showing "Device connected" with the tethered Stasher X1 lit up on the desk.

    Pair once

    The device wakes and the two agree on a shared key. Every frame after that is authenticated, so nothing can sit in the middle of the cable.

  4. The app installing firmware on the device, showing a progress bar and a verification notice.

    Updates you can verify

    Firmware arrives over the same cable, and the device checks the signature itself before accepting a single byte.

  5. The app waiting on "Confirm on your device" while the held Stasher X1 asks to confirm the transaction.

    Build here, approve there

    The app assembles the transaction and the device decodes it independently. You approve on the device screen — not on the screen that could be lying to you.

  6. A green confirmation on both the device screen and the app after the transaction is signed.

    Signed, then broadcast

    Signing happens inside the secure element and only the signature comes back. Your keys never crossed the cable.

What it does

Everything except spend your money

01

Every coin in one place

One dashboard for everything you hold, with live balances across every chain the device supports. Read-only by nature: the app can watch your addresses all day and still not spend a satoshi.

02

Full history

Every transaction you have made, with status and confirmations, kept on your own machine rather than an account somewhere.

Before you start

What you need

  • A Stasher X1 — the app does nothing without one
  • Windows 10 or later, 64-bit
  • Linux with glibc 2.28 or later, x86_64
  • A USB-C cable and a free port
See the device