Keep your private key safe
The current version uses the private key in session memory and does not store it persistently. The app cannot recover a lost key.
ALYAK / RUNBICKERS · ANDROID APP
Your coins.
Your choice.
Your transfer.
Choose which coins to spend
and what to leave untouched.
View, select and send your BTCMobick UTXOs.
Preparing for Google Play · Available after approval As of October 15, 2026
Actual app screen · Empty demo wallet
Built for BTCMobickSelect your own UTXOsOn-device signingMIT open source
WHY UTXO CONTROL
More than a balance.
Choose what you spend.
A wallet balance can consist of several unspent outputs, known as UTXOs.
UTXO Control focuses on letting you choose the outputs used in a transfer and review the amount and fee. It helps BTCMobick users understand and control their transactions.
01 / REVIEWYour wallet's outputs
UTXO A ✓UTXO BUTXO C ✓
02 / SELECTSpend only selected outputs
Illustrative exampleBuild a transaction with A + C.
Leave B unselected.
A SMALL GUIDE
Getting started,
one step at a time.
Never enter a private key on this website.
Open wallets and make transfers only inside the installed app.
The capture shows older storage-option text; the current version does not offer persistent private-key storage.
- 01
Open your wallet
Enter the WIF private key of a wallet you control, or scan its QR code in the app. Never share the key. Keep the original safely backed up.
- 02
Select your coins
Review your balance and UTXOs, then select the outputs to spend. You can view balances for Legacy and Native SegWit addresses.
- 03
Review the destination, amount and fee
Enter or scan the receiving address and set the amount. Check the address, selected outputs, amount and fee again on the final review screen.
- 04
Authenticate and send
Confirm with your PIN or configured biometrics. The transaction is signed on your device, then broadcast to the network. Use its transaction ID (TXID) to check the status.
YOUR KEYS. YOUR RESPONSIBILITY.
Stay in control.
Check carefully.
UTXO Control is not a custodial service. Review the following before sending a transaction.
Double-check before sending
Check the destination, network, amount and fee. Broadcast transactions are difficult to reverse. Start with a small test amount.
Broadcast is not confirmation
A transaction ID does not mean a transaction has been confirmed in a block. Check its status and confirmation count.
GOOD TO KNOW
Frequently asked questions.
Which network does UTXO Control support?
It is built for BTCMobick. Do not assume it supports other networks. Similar-looking addresses do not guarantee network compatibility.
Where are my keys and transaction data sent?
Signing takes place on your device. The app is designed not to send the private key itself to the lookup server. Balance queries and transaction broadcasting use external network services, which may receive address-related queries and your IP address. See the privacy policy for details.
Do I need an account?
No separate service account is required. The app PIN is a local wallet lock, not an account password. Leaving the app during a transfer locks the screen and requires authentication when you return. This website contains no wallet connection, private-key entry, payment form or analytics scripts.
Can I inspect or contribute to the code?
Yes. The app source is available on GitHub under the MIT license. Report bugs and suggest improvements through GitHub Issues. Never include private keys, recovery phrases or personal information.