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Watch-only bitcoin dashboard / macOS / Windows / Android / v0.4.0

Nakos

See every coin. Hold no keys.

A purely watch-only view of your bitcoin would let you see every coin, plan every spend and prepare your family without ever exposing a key. Nakos is that view. It reads public keys only, syncs from the node you run, and keeps its records in an encrypted vault on your Mac, Windows PC or Android phone. There is no account and no Nakos server.

Download for Mac
Apple Silicon (M1 or later) · macOS 11+
5.8 MB · .dmg · verify SHA-256
Download for Android
Android 7+ (64-bit ARM phones) · not on Google Play
15.5 MB · .apk · how to install · verify SHA-256
Download for Windows
Windows 11 (64-bit) · not signed yet
4.8 MB · .exe · how to install · verify SHA-256

Free for one wallet. A license is 21,000 sats, once, for every device and update.Buy a license →

Halvings since block 0 est. height — blocks to halving 5 — estimated from your clock at ~10 min a block

What it is

your own node, or a public server

Nakos is mission control for bitcoin you already hold in self-custody. Add wallets from public keys, sync them from your own node (or a public server, if you accept what it sees), and get a clear picture of your coins, your privacy and your plans.

When it's time to move coins, Nakos prepares an unsigned transaction and your hardware wallet signs it. Your keys never come near it.

nakos — statuslocal
$ nakos --status
mode      watch-only
keys      public keys only. no seed, ever.
vault     encrypted on this device (Argon2id, AES-256-GCM)
node      your own Electrum server, or a public one
explorer  off until you turn it on
accounts  none
telemetry none
signing   on your hardware wallet, via PSBT
$

Portfolio

Every wallet in one place: single-sig or multisig, added from an xpub, a descriptor or a single address.

Coins

Each UTXO on its own line. Label it, add notes, freeze it, and track the cost basis of each lot.

Spend plans

Compare a lowest-fee plan with a highest-privacy plan, then export an unsigned PSBT to sign elsewhere.

Inheritance

A plain-language family letter and an advanced recovery packet. Neither one contains a key.

Health

A score for your setup, with snapshots you can save when you want a history.

Encrypted backup

One passphrase-sealed file that restores your whole vault into a fresh install.

never asks for a seed never signs no account no cloud sync no analytics
> No node?

You don't need one to use Nakos. On the Node page, choose "Use a public server" and Nakos syncs through a public Electrum server, with every feature working. The trade-off is privacy: that server sees your wallet addresses and your IP address. Nakos explains this and asks you to agree before the first sync. You can switch to your own node any time.

Buy

21,000 sats, once

One payment. No account.

Nakos is free for one wallet. A license lets it track as many as you like, on every Mac, Windows PC and Android phone you use, with every future update. Pay 21,000 sats over Lightning or on-chain and the key appears on this page. No email, no sign-up. Nakos checks the key on your device, so it never has to call home.

  1. Pay 21,000 satsScan one QR with any Lightning or bitcoin wallet. Lightning is done in seconds; on-chain after one confirmation.
  2. Copy your keyIt appears here as soon as the payment counts. Save it. If you ever lose it, the recovery code in your wallet's history brings it back.
  3. Paste it into NakosSettings, then License. The same key works on all your devices and on new platforms as they arrive.

Payments go to our own BTCPay Server, which runs on our own node. The QR code is drawn in your browser from data that server sends; no tracker, analytics or third-party service sees your invoice.

Nakos license21,000 sats · one time

21,000 sats0.00021 BTC

One time. Every device, every future update. Checked offline.

Lost your license? Get it back

Install

three steps, about a minute

On a Mac

  1. Download the disk image

    Get Nakos_0.4.0_aarch64.dmg from this page. If you want to be sure it arrived intact, check its fingerprint before you open it.

  2. Drag Nakos to Applications

    Open the disk image, drag the Nakos icon onto the Applications folder, then eject the disk image.

  3. Open it the first time

    This version is not signed with an Apple Developer ID and has not been notarized by Apple, so macOS warns you the first time. You only do this once per version.

    1. Open Nakos from Applications. macOS says it could not verify that Nakos is free of malware. Click Done.
    2. Open System Settings, then Privacy & Security, and scroll down to Security.
    3. Next to the message about Nakos, click Open Anyway and confirm with your Mac password or Touch ID.

    Prefer not to bypass the warning? Wait for a signed release.

On Android

  1. Download the APK on your phone

    Open this page on your phone and tap Download for Android. Nakos isn't on Google Play; this file is the app.

  2. Allow the install

    Open the downloaded file. Android asks whether to allow your browser (or Files app) to install unknown apps: allow it for this install, then tap Install. You can turn that permission off again afterwards in Settings.

  3. Open Nakos

    Create your vault, or restore an encrypted backup. Later versions install over this one and keep your data, as long as they're signed with the same key (the certificate below).

    In Brazil, Indonesia, Singapore and Thailand, Android now blocks the normal install of apps from developers not registered with Google; there you need Android's "advanced flow" for unverified apps (a one-time wait set up in Developer options) or a computer with adb. Elsewhere the steps above work.

On Windows

  1. Download the installer

    Get Nakos_0.4.0_x64-setup.exe from this page. Your browser may say it "isn't commonly downloaded": keep it (in Edge, from the download's ··· menu). If you want to be sure it arrived intact, check its fingerprint before you open it.

  2. Get past SmartScreen

    This version isn't code-signed, so Windows says "Windows protected your PC" and shows Publisher: Unknown publisher. Click More info, then Run anyway. You only do this once per version.

  3. Install and open Nakos

    The installer puts Nakos in your user folder without asking for administrator rights and adds it to the Start menu. Create your vault, or restore an encrypted backup. If the WebView2 runtime is missing (some Windows 10 PCs), the installer downloads it from Microsoft.

    Prefer not to bypass the warning? Wait for a signed release.

Verify

don't trust, verify

Every file has a fingerprint.

On a Mac, open Terminal and run the command below; on Windows, open PowerShell and run the second one. Each prints the file's SHA-256 fingerprint. Paste the result into the box to compare it with the one published here. For the Android app, run the same command on the .apk on a computer.

Terminal
$ shasum -a 256 ~/Downloads/Nakos_0.4.0_aarch64.dmg
PowerShell
> Get-FileHash $HOME\Downloads\Nakos_0.4.0_x64-setup.exe

A match shows the file wasn't damaged on the way. It doesn't prove who made it, because the fingerprint comes from this same page.

SHA-256 · Nakos_0.4.0_aarch64.dmg
1aa30c45bd3a1b087d0c277a8c373fe6b50bf8cd3f7232d66d87291f88ed502c
SHA-256 · Nakos_0.4.0_arm64.apk
36976b6a96cd84f06ba2098c9083ca0e508e413843ba4adc0ff1347c6455380a
SHA-256 · Nakos_0.4.0_x64-setup.exe
a1dc2e3632497098b9254d6a9ff0a0cae9230d4c09469ee8b3a07bc42ffd7ffc
Android signing certificate (SHA-256)
E9:CF:53:A5:C9:B9:2F:13:3A:67:3D:08:71:6F:E3:40:78:E5:67:6D:91:F4:3B:EF:37:70:AA:E9:1E:66:E3:FC

Also published as SHA256SUMS. The Android certificate is the same for every Nakos release; apksigner verify --print-certs on the APK shows it.

Before you start, and known limits

before you start
  • Your passphrase can't be recoveredNakos encrypts the vault with your passphrase. Lose it and the data in the vault is gone.
  • Make an encrypted backupSettings, then Export encrypted backup. Keep the file somewhere other than this computer or phone.
  • "Remember on this computer" (Mac, Windows)Off by default. Turn it on and your passphrase goes into the macOS keychain, so Nakos unlocks when it starts. macOS then asks for your Mac login password (not your Apple ID). Click Always Allow to stop the prompt for this version, or Allow to approve once. It may ask again after an update. On Windows the passphrase goes into Credential Manager instead, with no prompt; on a work PC with a roaming profile it can travel with that profile.
  • Where your data lives~/Library/Application Support/com.nakos.app. To uninstall, quit Nakos, delete the app, and delete that folder only once you have a backup you've tested. On Windows the vault is in %LOCALAPPDATA%\com.nakos.app; uninstalling keeps it unless you tick "Also delete my Nakos vault". On Android the vault is in the app's private storage, and Android's cloud backup is turned off for it: your encrypted backup is the only copy elsewhere.
  • Nakos stays unlockedThere is no automatic lock. Nakos stays unlocked until you lock it (Lock, or the lock at the top on a phone) or quit it (on a phone, close it from your recent apps).
  • Known limits in 0.4.0An early release. Expect rough edges.
  • WindowsNot code-signed yet. Tested on Windows 11 only, in a virtual machine; not yet on Windows 10 or on a range of PCs.
  • AndroidNo "Remember" option: Nakos asks for your passphrase each time it opens. Wallets sync only while Nakos is open. The Map screen is desktop only.
  • Core RPC is plain HTTPYour RPC password or cookie isn't encrypted on the network. Use it on a network you trust or through a tunnel you control.
  • Electrum over TLSWorks, but hasn't been tested against many servers. Self-signed certificates haven't been tested.
  • Sync takes a momentEach wallet syncs in the background, one at a time, so Nakos stays usable. Through a public server, a wallet can take several seconds.
  • Fees are estimatesCheck the fee in your signing wallet before you sign.
  • MemoryWhile the vault is unlocked, your passphrase and key are in the app's memory. Nakos clears what it can, but copies can remain in memory, swap or crash dumps.

Questions

Can Nakos spend my bitcoin?

No. Nakos only ever sees public keys, so it can't sign anything. It can prepare an unsigned transaction (a PSBT) for you to check and sign on your own hardware wallet or signer.

Do I need my own node?

No, but it's the private way. Nakos syncs through an Electrum server. Your own keeps your addresses to yourself. Without a node, choose "Use a public server" on the Node page: every feature works, but that server's operator sees your wallet addresses, can link them together, and sees your IP address. Nakos shows you this and asks you to agree before the first sync.

Does anything get sent to you?

No. There's no Nakos account and no Nakos server. The app connects to the node and Electrum server you add, and to a public block explorer only if you turn one on in Settings. It's off by default.

What if I lose my computer or phone?

Install Nakos on another computer or Android phone and restore your encrypted backup with its passphrase. Your coins were never on the device in the first place: they're secured by your own keys, wherever you keep them.

Why does macOS warn me when I open it?

Version 0.4.0 isn't signed with an Apple Developer ID or notarized by Apple. The warning appears for any app like that. The install steps above show how to open it, and you can check the file's fingerprint first.

Why does Windows warn me when I open it?

Version 0.4.0 isn't code-signed, so Windows SmartScreen doesn't recognise it and shows "Unknown publisher". The install steps above show how to run it anyway, and you can check the file's fingerprint first.

Why isn't the Android app on Google Play?

Nakos is offered as a direct download, like the Mac app. Android asks you to allow the install once, and in a few countries it now needs extra steps for apps from developers not registered with Google (see Install). Check the file's fingerprint before you install it.

Linux, Intel Macs, iPhone?

Not yet. 0.4.0 runs on Apple Silicon Macs, 64-bit Windows and Android phones with a 64-bit ARM processor. It's tested on macOS 26, Windows 11 and Android so far.

Contact

bugs, ideas, business

Zilent@Tuta.io

Write to report a bug, ask for a feature or a change, or about anything else, business included. For a bug, say which version and device you're on and what you did just before it happened.

Never send your seed phrase, vault passphrase or private keys. Nakos never needs them, and nobody helping you does either.