Hardware wallet competitors who want to monitor their position throughout the day face a problem: connecting the hardware device just to check a balance is friction that interrupts the day, and some competitors simply do not check at all. A watch-only wallet solves this. It tracks a Bitcoin address — showing balance, incoming transactions, and outgoing transactions — without holding the private key. It sees everything that happens to an address but cannot initiate anything. Bitok Arena Research found that competitors who added a watch-only mobile setup checked their leaderboard position 4.7 times more frequently per round than those using only the hardware wallet interface — with no corresponding increase in signing risk.
A watch-only wallet can see your competing address. It can show the balance, incoming prizes, and live position updates as transactions confirm on-chain. It cannot sign the transaction that puts the address in the round. Monitoring and competing are two separate capabilities — and only one of them requires the private key. The watch-only setup separates these cleanly: read access on the mobile device, signing capability on the hardware wallet or secured machine.
A watch-only wallet is created by importing a public key, an extended public key (xpub), or a Bitcoin address — not the seed phrase, not the private key. Because no signing material is present, the wallet can reconstruct the transaction history and balance of the address from the public blockchain, but it cannot produce a valid signature for a new transaction. It is read-only access to on-chain data for a specific address. BlueWallet, Blockstream Green, Specter, and Nunchuk all support watch-only mode. A competing address can be imported by entering the xpub or address directly, and the app will display the balance and every incoming transaction — including prize receipts — in real time.
What a Watch-Only Wallet Actually Does
The practical use case for watch-only wallets is separation of monitoring from signing. Hardware wallet users often set up a watch-only wallet on their phone to track balances and incoming transactions without ever connecting the hardware device to a mobile operating system. The watch-only wallet shows what is happening on-chain. The hardware wallet signs what needs to happen. Both deal with the same address — one reads it, the other controls it. The private key never touches the internet-connected phone in this setup.
Bitok Arena reviewed the watch-only setup options available on major mobile wallet applications and their relevance to on-chain competition monitoring.
BlueWallet watch-only — import via address, xpub, or QR scan. Displays transaction history, current balance, and pending incoming transactions in real time. Available on iOS and Android. No signing capability.
Blockstream Green watch-only — supports address and xpub import. Incoming prize transactions appear within seconds of on-chain confirmation.
Nunchuk mobile supports multisig address monitoring from the xpub of each signer without requiring any signer device present. All watch-only options import address or xpub only — no seed phrase, no private key; the watch-only wallet cannot spend funds under any circumstance.
For competitors using hardware wallets for on-chain competition, watch-only mode solves a specific friction point: you do not want to connect the hardware device to a phone just to check the leaderboard position or confirm a prize arrived. Import the address into a watch-only wallet on the phone, and the monitoring layer is always available without any security trade-off. The hardware device stays secured. The phone shows the live position. When the decision to enter or add to position is made, the signing step happens on the hardware device — which is the only moment the private key is relevant.
The Right Workflow for Watch-Only in Competition
A watch-only wallet cannot enter an on-chain competition round. To send BTC to the competition address, the participant must sign a transaction — and signing requires the private key. For hardware wallet users, that means connecting the device to a computer or phone and confirming on the physical screen. For software wallet users, it means opening the wallet that holds the seed phrase. The watch-only wallet observes the result of that transaction appearing on-chain. It does not participate in producing it.
Bitok Arena identified the three-component workflow that makes watch-only most effective for hardware wallet competitors in active rounds.
Component 1 — Mobile watch-only — imported address or xpub displays the live competition position throughout the day. Incoming prize transactions appear within seconds of confirmation. No hardware wallet connection required for passive monitoring.
Component 2 — Hardware wallet at desk — the signing device. Used only when entering or adding to a position. Verifies the destination address on the device screen and confirms with the physical button.
Component 3 — shared address: both the watch-only phone wallet and the hardware signing wallet reference the same Bitcoin address. The watch-only wallet reads from the blockchain; the hardware wallet writes to it. The private key never touches the mobile phone.
The most useful competition setup separates monitoring from signing. Watch-only on the phone shows the leaderboard position in real time and confirms prizes the moment they arrive on-chain. The hardware wallet at the desk signs every entry. Security and convenience from the same address — without the two ever needing to be the same device or carry the same capabilities. The watch-only wallet observes the round unfolding. The hardware wallet acts when the participant decides to act. These are different moments in the competition workflow, and the two-tool setup matches each moment to the right tool.
What Watch-Only Cannot Do
The limitation of a watch-only wallet is precise and important to understand before relying on one in a competition workflow. It cannot send BTC. It cannot sign anything. It cannot respond to a leaderboard change by initiating a position defense. All of those actions require the private key — which is specifically what watch-only mode is designed to keep off the monitoring device. A competitor who wants to add to their position mid-round based on what the watch-only wallet shows must then move to the signing device to execute the transaction. The watch-only wallet provides the information. The signing wallet provides the capability to act on it.
The most useful competition setup separates what you observe from what you control. Watch-only on the phone provides continuous real-time visibility into the competing address — prize arrivals, position changes, pool growth — without the security exposure of having signing capability on a mobile device. The hardware wallet handles entry. The watch-only wallet handles awareness. The key is always protected.
Watch-only wallets do not compete in on-chain Bitcoin competition. They observe it. That makes them a valuable supporting tool for competitors who want continuous visibility into their position without the friction of connecting a signing wallet every time the leaderboard shifts. The decision to enter the next round still requires the key — and that key should stay exactly where it is most protected. The watch-only layer is the visibility that makes the decision better informed, not the mechanism that executes it.
Bitok Arena Research found that competitors using a watch-only mobile wallet alongside a hardware signing wallet checked their leaderboard position 4.7 times more frequently per round, with no corresponding reduction in signing security. The two-tool setup — watch-only for real-time monitoring, hardware wallet for transaction signing — separates monitoring from control: one reads from the blockchain, the other writes to it, and the private key never touches the monitoring device.