An iOS app for monitoring Bitcoin transactions in the mempool. Enter a transaction ID and the app starts a Live Activity that displays real-time status — confirmations, value, and fee — directly on the Lock Screen and Dynamic Island.
Updates are delivered via APNs (Apple Push Notification service), with no need to keep the connection to the server open.
| # | Description |
|---|---|
| 1 | Home — real-time dashboard with Greed & Fear Index, block height, fee estimates, wallet balance, next halving and BTC price |
| 2 | Wallets — list of wallets with aggregated total balance |
| 3 | Wallet Detail — imported wallet with balance, latest transactions, Receive and Send actions |
| 4 | Send Bitcoin — compose a transaction with recipient address, amount and fee rate (slow / medium / fast) |
| 5 | Settings — push notifications, network (mainnet/signet), balance format and preferences |
| 6 | Live Activity — real-time transaction tracking on the Lock Screen and Dynamic Island |
- Xcode 16+
- iPhone running iOS 17+ (Live Activities do not work on the Simulator)
- XcodeGen installed (
brew install xcodegen) - Apple Developer account with push notifications capability
- APNs Key (
.p8) generated in the Apple Developer Portal — required by the server to send pushes
Actual monitoring depends on the api-mempool-monitor server, which watches the blockchain and dispatches notifications via APNs.
git clone https://github.com/rubensmachion/ios-mempool-monitor.git
cd ios-mempool-monitorcp MempoolMonitor/Configs/Local.xcconfig.template MempoolMonitor/Configs/Local.xcconfigEdit Configs/Local.xcconfig with your own values:
PRODUCT_BUNDLE_IDENTIFIER = com.yourcompany.satstack
PRODUCT_BUNDLE_IDENTIFIER_WIDGET = com.yourcompany.satstack.widget
PRODUCT_BUNDLE_IDENTIFIER_TESTS = com.yourcompany.satstack.tests
# api-mempool-monitor server host (without http://)
MEMPOOL_MONITOR_HOST = 192.168.x.x:3000
xcodegen generate --spec MempoolMonitor/project.ymlopen MempoolMonitor/SatStack.xcodeprojSelect the SatStack scheme, connect an iPhone, and run with ⌘R.
For monitoring to work, the api-mempool-monitor server must be running and configured with:
- The APNs Key (
.p8) generated in the Apple Developer Portal - Your Apple account's Team ID and Key ID
- Access to the public mempool.space API
See the server's README for setup instructions.
xcodebuild test \
-project MempoolMonitor/SatStack.xcodeproj \
-scheme SatStackTests \
-destination 'platform=iOS Simulator,name=iPhone 16'Or from Xcode: select the SatStack scheme and press ⌘U.