Bitcoin performance tracking for self-custody
Track your Bitcoin.
Keep your keys.
See how your cold-storage Bitcoin has performed. BTC Mate takes a public Bitcoin address and shows balance, activity, estimated entry price and profit/loss, like an exchange portfolio, without connecting your wallet or entering a private key or seed phrase.
For self-custody
Track a cold wallet without connecting it
Have Bitcoin in self-custody and want to see how it has performed? BTC Mate lets you monitor a public Bitcoin address and view estimated entry price, profit/loss and historical performance, calculated from public blockchain activity and historical Bitcoin prices, without connecting your wallet or entering a seed phrase or private key.
What BTC Mate is
A watch-only portfolio tracker, not a wallet
BTC Mate is an iPhone app for tracking public Bitcoin addresses and estimating the performance of Bitcoin held in self-custody. It reads what is already publicly visible on the blockchain, combines it with historical prices and turns it into a clear overview: balance, activity, estimated entry price, estimated profit/loss and performance over time. It cannot send, receive, buy, sell or hold Bitcoin.
No wallet connection. Your private key and seed phrase are never part of this; they stay wherever you keep them.
How it works
Three steps. No keys involved.
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Enter a public Bitcoin address
Paste or scan a public Bitcoin address, for example the receiving address of your hardware wallet, and give it a label.
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BTC Mate reads public blockchain data
The app retrieves the publicly observable transactions and balance for that address and combines them with historical Bitcoin prices.
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See activity, performance and insights
View balance, activity, estimated entry price, estimated profit/loss and performance over time, alongside Bitcoin market data, news and network insights.
- No seed phrase
- No private key
- No custody
- No transactions
More than a tracker
One Bitcoin companion, five connected parts
The performance tracker is the reason to download BTC Mate. Around it sits a set of native Bitcoin tools that help you understand what you are looking at.
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Track
Add public addresses with labels and see balance, activity and historical performance in your currency. Estimated entry price and profit/loss are derived from on-chain history and historical prices, for one address or all of them together.
How performance is estimated -
Explore
Inspect addresses, transactions and blocks with the native blockchain explorer: balance, inputs and outputs, confirmations, fees, the mempool and the latest blocks, presented in plain language instead of raw explorer output.
About the blockchain explorer -
Network
Explore reachable Bitcoin nodes on an interactive globe with a timeline from 2009 to today, alongside hashrate, difficulty and block height.
About the network map -
Learn
Understand the concepts behind the numbers: how a transaction travels, what the mempool is, what halvings do to supply, what nodes do, plus a glossary, each explained next to the data it describes.
Learn Bitcoin inside the app -
News
Read Bitcoin news from several publishers without leaving the app, with a native article reader, upcoming market events and selected social updates. Market data and a chart with drawing tools sit alongside.
About the news reader -
Privacy-conscious by design
No account, no sign-up, no private key. Your addresses are stored on your device. The App Store privacy label for BTC Mate lists no data collected by the developer.
Public address vs. private key
Made for self-custody
The portfolio view your cold wallet never had
Exchanges show you a profit and loss line; hardware wallets show you a balance. BTC Mate closes that gap. Add the receiving address of your cold storage and get the overview you are used to, estimated entry price, estimated profit/loss and value over time, without moving coins or plugging anything in.
- Works with any hardware or software wallet that gives you a public address
- No device connection, no companion software, no partnership required
- Values in EUR, USD, GBP and other supported currencies
Security model
What BTC Mate does, and what it cannot do
The distinction matters, so here it is without marketing language.
| Capability | BTC Mate | A Bitcoin wallet | A block explorer |
|---|---|---|---|
| View balance and transactions of a public address | Yes | Yes (own addresses) | Yes |
| Save multiple addresses with labels | Yes | Yes | Usually no |
| Historical performance, estimated entry price and P/L | Yes (estimates) | Rarely | No |
| Market data, news, events, network insights | Yes | Varies | Partly |
| Needs your private key or seed phrase | No | Yes | No |
| Send, receive or sign transactions | No | Yes | No |
| Buy, sell or trade Bitcoin | No | Some | No |
| Holds or custodies your Bitcoin | No | No (self-custody) / Yes (custodial) | No |
Sharing a public address does not give someone control over the funds, but it can reveal financial activity and therefore has privacy implications. More on what a public address reveals.
Screenshots
A calm view of your Bitcoin
Real screens from BTC Mate on iPhone.
FAQ
Common questions
What is BTC Mate?
BTC Mate is an iPhone app for tracking public Bitcoin addresses and estimating the performance of Bitcoin held in self-custody. You enter a public address and see balance, activity, estimated entry price, estimated profit/loss and historical performance, based on public blockchain data and historical prices. The app also includes a native blockchain explorer, an interactive map of reachable Bitcoin nodes, Bitcoin education, market data and a news reader.
Is BTC Mate a Bitcoin wallet?
No. BTC Mate is a tracking and analytics tool, not a wallet. It does not hold Bitcoin, does not manage keys and cannot send or receive funds. You keep using the wallet you already have; BTC Mate only reads public information about the addresses you choose to track.
Can BTC Mate access my Bitcoin?
No. A public Bitcoin address only allows viewing the blockchain activity associated with it. Moving Bitcoin requires the private key, which BTC Mate never asks for and never has. The app has no way to sign or initiate a transaction.
Does BTC Mate need my private key?
No. Public-address tracking only needs the public address. BTC Mate has no field for a private key and never requests one. As a general rule, never enter a private key into any app or website that only needs to display information.
Can I monitor a cold wallet with BTC Mate?
Yes. A cold wallet keeps the private keys offline, but its addresses are still public. Add the receiving address of your cold wallet to BTC Mate and you get a watch-only view of its balance and estimated performance while the keys never leave cold storage.
Can I track Bitcoin performance without connecting my wallet?
Yes. BTC Mate only needs the public address. It reads the address's transaction history from the blockchain, combines it with historical Bitcoin prices and shows estimated entry price, estimated profit/loss and value over time. The wallet is never connected, and no private key or seed phrase is entered. How performance tracking works.
How does BTC Mate estimate profit/loss?
BTC Mate looks at the incoming transactions of an address on the blockchain and uses the historical Bitcoin price at the time of each transaction as the estimated acquisition price for those coins. From this it derives an estimated entry price and compares the estimated acquisition value with the current market value to show an estimated profit or loss. Full explanation of the method and its limits.
Is BTC Mate available for iPhone?
Yes. BTC Mate is available on the App Store for iPhone and requires iOS 26.2 or later. The App Store listing also shows compatibility with Mac (Apple silicon) and Apple Vision. There is currently no Android version.
Track your Bitcoin address. Keep your keys.
BTC Mate is available for iPhone. Add a public Bitcoin address and see balance, activity and estimated performance in one place. No seed phrase, no private key, no custody.