OverMobile

Kaspa kHeavyHash miner for Android, with optional OverManager integration for remote monitoring and control.

Low hashrate expected on mobile devices. Do not expect meaningful profit — treat it as lottery-style mining.

Features

• Native kHeavyHash miner ported from the KASDeck ESP32 miner, compiled for arm64-v8a, armeabi-v7a, and x86_64
• Stratum v1 client with mining.subscribe / mining.authorize / mining.submit, extranonce support, and a 10 s connect timeout
• Pool connection UX — CONNECTING / CONNECTED / ERROR states with specific reasons (REFUSED, TIMED OUT, DNS FAILED, UNREACHABLE, NO NETWORK); cancellable even during a stuck retry
• Thermal monitoring + auto-throttle — pauses mining when the device hits critical temperatures
• Live battery / temp / thermal-state dashboard alongside hashrate, accepted/rejected shares, hash total, and thread count
• QR code scanning for the Kaspa wallet address (bundled ZXing — works offline, no Play Services required). Handles bare addresses, kaspa:kaspa:… double-prefixed URIs, and ?amount= query params
• Configurable thread count (1…CPU cores) with a warning band for heavy settings
• Foreground service keeps mining alive in the background with a persistent notification and a one-tap Stop action
• Mining log — the last 4 hours of stratum/hashing events, viewable from the Logs tab
• OverManager integration — pair once with a 6-digit code, then telemetry posts every 30 s and remote commands (set_config, set_threads, start, stop, restart) are applied and acknowledged

Requirements

• Android 8.0 (API 26) or newer
• ARMv7, ARM64, or x86_64 CPU
• Internet access (cellular or Wi-Fi) to reach the pool
• A Kaspa wallet address (the payout goes here)

Note: v1 has been tested on the Android emulator and a single physical device (TCL A3X). Behavior on other Android versions and OEM skins has not been exhaustively verified — please open an issue if something misbehaves on your device.

Install

Option A — Sideload the signed APK from Releases

1. Download the latest popmobile-vX.Y.Z.apk from the Releases page.
2. On your phone, allow Install unknown apps for your browser or file manager (Settings → Apps → Special app access).
3. Tap the downloaded APK and confirm.

Option B — Build from source

git clone https://github.com/overbuildlabs/overmobile.git
cd overmobile
# Open in Android Studio, or build from the CLI:
./gradlew assembleDebug        # unsigned debug APK
./gradlew assembleRelease      # signed release APK (requires keystore.properties — see below)

The APK will be in app/build/outputs/apk/{debug,release}/.

Configure

After first launch, open Settings:

Field	What to set
Pool URL	stratum+tcp://host:port — e.g. stratum+tcp://pool.overbuildlabs.com:5558
Wallet Address	Your kaspa:… payout address. Paste it, or tap Scan QR to use the camera
Worker Name	Any label you like — shows up in pool stats. Defaults to OverMobile
Threads	How many CPU cores to mine on. More threads = more heat and battery drain

Tap SAVE (the "Settings saved!" notice appears above the button), then go back to the Dashboard and tap START MINING.

Supported Kaspa QR formats

• Bare: kaspa:qyp…
• Double-prefixed: kaspa:kaspa:qyp… (emitted by some wallets)
• With amount: kaspa:qyp…?amount=1.5

All three are accepted; the app normalises to the bare form before saving.

OverManager integration

OverManager is a self-hosted dashboard that can monitor and control multiple Kaspa miners (including Iceriver ASICs and OverMobile instances).

Pair a device

1. In OverManager, click Add Miner → Pairing Code. Copy the 6-digit code.
2. In OverMobile → Settings → OverManager Integration:
   • Server URL: http://<popmanager-host>:8787
   • Device Name: any label (e.g. Pixel-6-garage)
   • Tap Pair, enter the 6-digit code
3. Watch for the green Paired · reporting badge. The phone appears in the OverManager dashboard within ~30 s.

Once paired, the API key is stored on-device and every subsequent report authenticates automatically.

What OverManager sees

The reporter posts telemetry every 30 s whether the miner is running or idle:

• Hashrate, accepted/rejected shares, total hashes
• CPU temperature, battery percentage, thermal state (NORMAL / WARNING / THROTTLE / CRITICAL)
• Active thread count and user-configured thread target
• Pool URL and status, worker name, manufacturer (OverBuild Labs), model (Mobile)

Remote commands

OverManager can push these commands via the /report response; the phone applies them and acknowledges in the next report:

Command	Effect
set_config	Change pool URL, wallet, or worker name
set_threads	Change thread count
start	Start mining
stop	Stop mining (reporter keeps running)
restart	Stop then start

Acks are persisted — if the app is killed mid-command, the ack is still delivered on the next successful report.

Release signing

The release build is signed with a keystore that lives outside this repo. To produce your own signed release:

# 1. Generate a keystore (do this ONCE and back it up securely)
keytool -genkey -v \
  -keystore /some/path/outside/repo/popmobile-release.keystore \
  -alias popmobile -keyalg RSA -keysize 2048 -validity 10000

# 2. Create keystore.properties in the repo root (gitignored)
cp keystore.properties.example keystore.properties
# …then edit it with the real path + passwords

# 3. Build
./gradlew assembleRelease

If keystore.properties is absent, assembleRelease still produces an APK but it's unsigned and can't be installed.

Project layout

app/src/main/
├── cpp/                   # Native kHeavyHash + mining loop (C, compiled via NDK)
├── java/com/proofofprints/popmobile/
│   ├── ui/                # Compose UI: dashboard, settings, logs, QR scanner, splash
│   ├── service/           # Foreground MiningService (pool connection, thermal, lifecycle)
│   ├── stratum/           # Stratum v1 client
│   ├── mining/            # JNI bridge to the native miner
│   ├── popmanager/        # OverManagerReporter (telemetry + remote commands)
│   └── thermal/           # ThermalMonitor + auto-throttling
└── res/                   # Resources (icons, themes, strings)

The top-level KASDeck.ino and KASDECK_PORT_REFERENCE.md are the upstream ESP32 reference implementation — they aren't part of the Android build but are kept for hash-algorithm cross-checking.

Contributing

• Bugs / feature requests: GitHub Issues
• Pull requests: welcome — please include a test plan and the device you tested on
• Play Store: not a target. Google prohibits on-device cryptocurrency mining apps. Distribution is via direct APK, F-Droid, and Obtainium

License

MIT — see LICENSE.

© 2026 OverBuild Labs