MultiBMS

MultiBMS connects your iPhone to Bluetooth-enabled battery management systems and shows what your batteries are doing—pack voltage, individual cell voltages, current, power, state of charge, temperature, balancing activity, capacity, and history—in one clean app. MONITOR EVERY BATTERY Connect to multiple compatible BMS devices simultaneously. Open any individual pack for detailed diagnostics, cell health, balancing status, temperature, current, capacity, and recent history. BUILD BATTERY GROUPS Bring multiple packs together in custom parallel or series groups. Group dashboards combine voltage, current, power, remaining capacity, and every cell into one clear bank-level view while preserving access to each individual battery. It is useful for RV, solar, marine, workshop, fleet, custom vehicle, and home-built battery systems. CHARGING AT A GLANCE Choose Energy Rail, Orbit, or Mist charging visuals. Green indicates charging, red indicates discharging, and animation speed responds to measured current. System Reduce Motion is respected. APPLE WATCH AND RACE MODE The included Apple Watch companion preview demonstrates Fleet, Cells, alert thresholds, and Race Mode. Race sessions are designed for builders and enthusiasts, with laps, voltage drop, lowest voltage, peak current and power, temperature, weakest-cell, cell-delta, energy, and full session summaries. Watch telemetry is clearly labeled demo data in this release; live iPhone-to-Watch BMS synchronization is planned for a future update. SUPPORTED HARDWARE MultiBMS includes support for multiple common BMS protocols. JiKong and JBD/Xiaoxiang hardware have been tested directly. Other included protocols are marked BETA where broader real-hardware verification is still underway. BUILT WITH USERS MultiBMS is actively developed with the goal of becoming the best battery monitor for builders, racers, RV and solar owners, and anyone managing more than one battery. If something does not work as expected—or you have an idea that would make the app better—use Report a Bug or Request a Feature in Settings, or contact [email protected]. Every message is reviewed. PRIVACY MultiBMS works offline, requires no account, contains no advertising, and does not collect personal data. Bluetooth permission is used to discover and read compatible BMS devices. Privacy policy: https://multibms.com/privacy MultiBMS is an independent application and is not affiliated with, endorsed by, or sponsored by any battery-management-system manufacturer. Third-party names are used only to identify hardware compatibility and remain trademarks of their respective owners.