NOOP🪓
A Windows build
The same offline, local-first app, brought to PC. It's the next target after macOS, Android and iPhone, and support is what makes it happen.
Optional · One‑off · Never a subscription
NOOP is free.
It stays free.
This page only exists because people kept asking how to chip in. There is no paywall, no "pro" tier and no locked screen. Every feature works fully without paying a penny. If NOOP is useful to you and you want to help keep it going, here is how. If you don't, nothing changes, and you'll never be asked twice.
No ads
No data selling
No account
Free forever
Where it goes
No company. No investor.
Just the bills.
Keeping NOOP free, anonymous and off the cloud means there's nobody behind it but a small independent team, covering the costs out of pocket. A little support genuinely decides what gets built next.
A donation also keeps a project alive that keeps hardware out of landfill and your data off the cloud. The most sustainable wearable is the one you already own, and NOOP keeps the strap you bought useful for years.
⏱
Test hardware
Straps and rings to test on, so support stays current as firmware changes. The reverse-engineering only works against real devices in hand.
✨
More time
The work is ongoing and unpaid. Deeper analytics, broader device coverage and polish across every screen all come down to hours someone can spend.
What you're keeping free
Every screen, for everyone, at no cost.
This is the whole app, not a teaser. Recovery, a deep feature set, full score breakdowns and your daily view. None of it sits behind a payment, and support is what keeps it that way.
Today, the full feature set and every score explained. All free, all on your own device.
Independent, and staying that way.
A donation is a thank-you, not a transaction. Nothing about the app, your data or your access depends on it. Support simply keeps NOOP yours: free, private, and answerable to the people who use it rather than to anyone paying for it.
How to chip in
Crypto, on purpose.
Staying anonymous rules out PayPal, Patreon or anything with a name attached, so donations are crypto only. That's not a hurdle. It's quick, global and private for both sides. New to it? It's about a two-minute job.
1
Get a little crypto
Use any mainstream app, Coinbase, Kraken, Binance or Cash App. Buy a small amount of Bitcoin or Ethereum with a debit card or bank transfer. A suggested £40 or so, a fraction of a year's WHOOP subscription, though anything is appreciated.
2
Open the addresses
The receiving addresses are further down this page, and also in the app under Support with a scan-to-donate QR code for each one.
3
Send and confirm
Tap Send or Withdraw, scan the QR or paste the address in full, and confirm. Always send a coin to its own network.
Pick whichever you already hold
Three standard receiving networks, no preference between them. Tap an address to select it, then copy. Always check the first and last few characters before you send.
The addresses
Send to one of these.
These are the genuine receiving addresses. The same ones appear in the app under Support, each with a scan-to-donate QR code. Copy in full, send a coin only to its matching network, and remember crypto transactions are irreversible.
BTC
Bitcoin
Bitcoin networkReceiving address
bc1qn2gkl7wslwpws06mvazjn2uu689zlkv7kg3kf5
Send BTC on the Bitcoin network only.
ETH
Ethereum
Ethereum mainnetReceiving address
0xd64D508b531c4b1297Ca4023C774e0E97aA67B7F
A standard address. When in doubt, send on Ethereum mainnet.
ADA
Cardano
Cardano networkReceiving address
addr1qxsju3y0mlke2h6h2g6qgnq4r3jstngtyjxs0nnp5zrv28zv8p5rgzruxyjz33j9k23pffta8z639e2snjdd4vcetfqsn4vwr3
Send ADA on the Cardano network only.
Before you send: only ever send a coin to its matching network, and double-check the first and last few characters of the address. If you would rather not copy by hand, the in-app Support screen has a scan-to-donate QR code for each one. Crypto transactions are irreversible.
A look at what's built
This is where your support goes.
Real screens from the app you can download right now. Every one of them is free, and every penny donated goes back into building more of them.
From your daily summary to the settings that keep everything on your device.
Honestly, if you can, please do.
It's the difference between this being a one-off and an ongoing thing. There's no record of who has or hasn't given, and nothing to unlock, just the project carrying on, free and in the open.
Rather not use money? Help is just as welcome: open an issue, send a pull request, or help test on hardware you own. That moves the project forward as much as anything.
Our side of the deal
What we'll never do.
×
No ads
Not now, not ever. There is nothing to interrupt you and nobody to sell your attention to.
×
No data selling
Your data never leaves your device. There is no server to hold it and nothing to sell.
×
No subscription
One app, free forever. No trial, no "pro" tier, no monthly anything.
×
No nagging
Say no and that's the end of it. The app will never ask you to pay to do anything.
The fine print, up front
What a donation is not.
- Not a subscription. One-off, whenever you like, never recurring.
- Not required. Every feature works fully without paying anything.
- Not a licence. You don't owe anything to use, fork or build NOOP. It stands on prior community work, credited in the repo.
- Not tied to your data. NOOP has no server and no account. There is nothing to unlock and no record of who has or hasn't donated.
NOOP is an independent, unofficial interoperability project. It is not affiliated with, endorsed by or connected to WHOOP or Oura, and it is not a medical device. Derived metrics are approximations, not clinical data.