Hash CommanderTranslation for convenience; the Portuguese version prevails.
← Back to homePrivacy Policy — Hash Commander
Last updated: 13 November 2026. Data controller: Hash Commander (hashcommander4@gmail.com).
Principle
Hash Commander runs on your computer. There is no mandatory account and no server of ours storing your mining data. We do not sell data.
1. What stays only on your computer
App settings, the list and addresses of your machines, hashrate and temperature history, alert settings, market data (sessions, receipts, ratings), keys and wallet connections. All in local files, not sent to us.
2. What leaves your computer (when you use the relevant feature)
| Destination | Purpose | What it can see |
|---|---|---|
| This download site | Checking for updates | Your IP and the version requested, as with any web request |
| Mining pools you choose | Statistics and mining | Your IP and the worker/payout address you configured |
| mempool.space | Prices, network hashrate, transaction/address status | Your IP and the addresses queried |
| Binance (public API) | Quotes | Your IP |
| News sources (RSS) | News | Your IP |
| Nostr relays | Market listings and messages | Nostr public key, public listings and metadata; rental messages are encrypted |
| Market counterparty | Carrying out the rental | The buyer's pool details, payout address, performance |
| Lightning / Bitcoin network | Payments | Public data specific to those networks. Bitcoin transactions are public and permanent |
| Telegram, Discord, webhooks, MQTT | Only if you enable alerts | The alert content, to the destination you specify |
| Authentication/chat service (if you use it) | Account and presence | Identifier/email and messages you send |
Each third-party service has its own policy; we do not control what they do with the data.
3. Community sharing and counter
This is optional and only happens if you turn it on in the app. When on, the app sends data such as your nickname, hashrate and number of machines to Firebase (Google); this data is only visible to signed-in users. By turning it on you also contribute to two anonymous totals: the number of connected miners and the total TH/s. These totals are stored in a public Firebase node (stats/community) and the site only shows them from 5 miners upwards. No individual data is public. If you turn sharing off, you stop contributing.
Anonymous usage statistics
So we know how many PCs use the app and with how many machines, each installation creates a random code (no name, email, IP or computer data) and sends to Firebase (Google), once a day: that code, the app version, the system (Windows, Linux, Mac or Docker), the number of configured machines and how many run Hash Commander OS. Only the project team can read this data. You can turn it off under Alerts › "Share anonymous statistics": the app stops sending and deletes your installation's record.
4. The website
- The site is hosted on Cloudflare (Workers) and downloads come from Cloudflare R2. Cloudflare may log requests (IP, date, file) for security and performance.
- The Market page reads public listings directly from Nostr relays (relay.primal.net, relay.nostr.net, offchain.pub and nostr.oxtr.dev) from your browser. Those relays therefore see your IP.
- The home page reads the community totals from Firebase (Google) from your browser, which therefore also sees your IP.
- The "My account" page communicates with Firebase Authentication (Google) so you can sign in, change your password or delete your account. The session stays only in the browser tab and disappears when you close it.
5. Support
The app's bug and suggestion buttons open an email message to hashcommander4@gmail.com with diagnostic information: version, language, theme, number of machines, browser, platform and screen resolution. You can see and edit the text before sending; nothing is sent until you press send in your email program.
6. Cookies and analytics
The site uses no cookies and no advertising tools. To know how many people visit it, we use Cloudflare Web Analytics: it counts page views anonymously (page, day, approximate country, browser and device type), with no cookies, without identifying visitors and without tracking you across sites. The demo (/demo/) does not have this counter.
7. Your rights (GDPR)
Access, rectification, erasure, restriction, objection and portability, where applicable. Since the app's data stays on your computer, you can delete it by uninstalling and removing the data folder. Requests: Hash Commander (hashcommander4@gmail.com). Complaints: CNPD (cnpd.pt).
8. Minors
The program is not intended for people under 18.
9. Security
Signed updates and HTTPS. No system is infallible; protect your computer and your keys.
This is a template and does not replace legal advice; for commercial use a review by a lawyer is advisable.