The apps I found for the Bookoo scale were overcomplicated and awkward to use. I wanted something simple. So this is it — a straightforward iOS companion for your Bookoo Mini Scale: real-time weight, a brew timer, and tare controls over Bluetooth. Nothing more, nothing less. (Okay, it grew a little — but it's still simple to use.)
- BLE connection to Bookoo Mini Scale (official protocol) with auto-reconnect
- Live weight display — grams, large readable digits
- Brew timer — start/stop/reset with 0.1s precision, separate tare button, auto-start on pour detection
- Auto-detect pour — optionally auto-starts the timer when weight crosses a configurable threshold
- Real-time graph — dual-axis chart of weight (g) and flow rate (g/s) over time
- Flow-stop detection — vertical dashed line + label marking when flow drops below threshold
- Peak weight annotation — horizontal dashed line at the maximum weight reached
- Brew saving — save each brew with auto-generated stats (duration, final weight, peak weight, peak flow)
- Bean weight & grind setting — stepper controls with configurable step size, last-used values retained
- Brew history — scrollable list with thumbnail charts, swipe to edit or delete, inline underlay badge
- Underlay comparison — overlay a past brew's graph behind the live data for reference
- Screen stays awake — display sleep prevented while a scale is connected (auto-disables on disconnect)
- Battery level from the scale with low-battery color warnings (yellow ≤20%, red ≤10%)
- Settings — pour trigger threshold, flow axis auto-range or fixed max, flow-stop detection threshold, grind step size
- ScaleSimulator — companion macOS app that simulates a Bookoo scale for testing
| Weight Display | Brews | Splash Screen |
|---|---|---|
 |
 |
 |
- iOS 18.0+
- Xcode 16.0+
- A Bookoo Mini Scale (or compatible BLE scale)
You need a Mac with Xcode and a free Apple ID — no paid developer program required.
- Install AltStore on your iPhone
- Open
booBud.xcodeprojin Xcode - Plug in your iPhone, select it from the device dropdown
- Sign in with your Apple ID (Xcode → Settings → Accounts)
- Press ⌘R to build and run — this signs the app with your Apple ID
- Run
./build-ipa.sh— this packages the signed build asbooBud.ipaon your Desktop - AirDrop
booBud.ipato your iPhone - In AltStore: My Apps → + → select the
.ipato install - To update later: rebuild, run
build-ipa.shagain, and re-install via AltStore
The app stays installed for 365 days — AltStore re-signs the provisioning profile, so no weekly refresh is needed.
- Open
booBud.xcodeprojin Xcode - Plug in your iPhone, select it from the device dropdown
- Sign in with your Apple ID (Xcode → Settings → Accounts)
- Press ⌘R to build and install
- On iPhone: Settings → General → VPN & Device Management → Trust your Apple ID
The app expires after 7 days — just rebuild to refresh.
booBud communicates with the Bookoo Mini Scale over Bluetooth Low Energy using the official open-source protocol:
- Service UUID:
0x0FFE(primary) - Weight notifications: characteristic
0xFF11(20-byte packets with grams, flow rate, battery, timer) - Commands: characteristic
0xFF12(tare, timer start/stop/reset, mode switch) - Device Name: characteristic
0xFF1E(readable, used for authoritative display name)
booBud/
├── App/ # @main app entry
├── BLE/ # BookooProtocol + ScaleBLEController
├── Models/ # WeightReading, WeightUnit, BrewTimerState, GraphPoint, SavedBrew, BrewStore
├── ViewModels/ # ScaleViewModel (@Observable state)
├── Views/ # ContentView, WeightDisplay, BrewTimer, Controls, DeviceDiscovery, Settings, BrewHistory, BrewThumbnail, BrewEditSheet
├── Resources/ # Info.plist (BLE permissions)
├── Assets.xcassets/ # App icon, accent color
└── scripts/ # bump-build-number.sh (auto-increment build number)
ScaleSimulator/
└── ScaleSimulator/ # macOS BLE peripheral companion — simulates a Bookoo scale for testing
MIT