GeeFlow

GeeFlow is a free, open-source, privacy-first companion app designed for espresso enthusiasts to monitor, control, and profile coffee extractions over Bluetooth Low Energy (BLE). Whether you want fine-grained control over extraction pressure, real-time feedback from a smart coffee scale, or precise boiler temperature tuning, GeeFlow gives you complete command over your brewing setup. KEY FEATURES: ✨ 100% Free & Open-Source (GPL-3.0) • Fully open-source project with complete code transparency on GitHub. • Independent, community-driven software with no paywalled core features and no subscriptions. ☕ Advanced Brew Profiling • Multi-step profiling: Configure pre-infusion, pressure profiling, flow rates, and hold times. • Freehand brewing: Steer pressure and flow live directly from the control screen. • Auto-finish triggers: Automatically stop extractions based on target brew weight or volume. • Profile library: Create, duplicate, and customize multiple recipes. 📊 Real-Time Extraction Dashboard & Live Charts • Live telemetry: Monitor brew and steam boiler temperatures, brew pressure, water flow, and elapsed time. • Interactive curves: Real-time graphs for pressure, flow rate, weight, and flow-by-weight. • Shot history: Review recorded extraction curves and compare past brews. ⚖️ Smart Scale Integration • Seamlessly pair supported Bluetooth coffee scales. • Real-time weight and weight flow calculation feeding directly into dashboard charts and cut-off conditions. ⚙️ Machine Control & Settings • Independent control and target temperatures for brew and steam boilers. • Quick steam boiler toggle directly from the dashboard. • Low water level warnings and real-time heating status. 🔒 Privacy-First & 100% Offline • No account or registration required. • Zero telemetry, zero analytics, zero data collection. • All recipes and brew data remain strictly stored on your local device. 📱 Built-in Demo Mode • Explore the full interface, test profiles, and experiment with charts without needing physical hardware connected. --- HARDWARE COMPATIBILITY & DISCLAIMER: • Currently tested and supported: Wendougee Data-S espresso machine and compatible smart scale. • This is an independent, unofficial, open-source project (GPL-3.0). It is not affiliated with, endorsed, or certified by any hardware manufacturer. • Because this app sends direct control commands to heating and pressurized equipment, you must never leave connected machines unattended. Use at your own risk.