Connect mixed Bluetooth battery systems, combine packs into real banks, and record battery data with speed and motion on iPhone and Apple Watch.
Send the issue from this page. Include your BMS, phone, vehicle, or battery setup if you can. Real reports help me fix problems and add support for hardware people actually use.
Monitor every pack, understand every cell, create complete battery banks, and choose how live energy moves across your screen.
Voltage, current, power, charge state, capacity, temperature, cycles, and status across multiple connected packs.
Create parallel or series banks with combined totals while retaining full access to each member battery.
Minimum, maximum, delta, balancing state, weak-cell warnings, and multiple visual layouts.
Energy Rail, Orbit, and Mist make charge and discharge direction instantly understandable.
Set low pack voltage, low cell voltage, high temperature, and Watch alerts for each use case.
Four included styles and a collection of optional skins for RV, marine, industrial, racing, and custom builds.
Group batteries into a real bank and see the combined result without losing access to the individual packs underneath.
Four skins are included free with the app. Premium instrument skins are optional one-time purchases that unlock the look only, so live battery data and controls work the same in every one. Bus Life, Marine and Off Grid are available now; Gridline Racing and Hypercar are coming soon.
Neon glows and glassmorphism.
Minimal and modern.
Futuristic heads-up display.
Dense industrial monitoring.
Full analog instrument dashboard, built for skoolies and vans.
Forged carbon analog cluster.
Carbon, neon and underglow.
Brass helm electrical panel.
Rugged power cabinet.
Premium skins are one-time App Store purchases, not subscriptions. Images are the app rendered with sample battery data.
If your hardware, layout, or workflow needs something different, send feedback. I’m happy to listen, make changes where they help, and work with real users to get them going.
Share your setup →This is a real screen recording from a golf cart test. MultiBMS captures speed, G-force, distance, voltage, current, power, temperature, and cell values together. Stop the run, open it, and review the results in the same app.
Create profiles for e-bikes, scooters, ATVs, karts, boats, or custom machines. Choose the battery, Watch screens, sensors, lap controls, and safety thresholds that matter.
Real MultiBMS screens from a live two-pack JBD/Xiaoxiang installation.
MultiBMS recognizes supported BMS protocols and clearly distinguishes directly tested families from beta support that can vary by model and firmware.
Brand names are used only to identify compatible hardware. MultiBMS is independent and is not affiliated with, certified by, sponsored by, or endorsed by any BMS manufacturer. All trademarks belong to their respective owners.
I’m looking for a small group of people with different phones, vehicles, batteries, and BMS hardware. You don’t need to be technical. Clear feedback about what works and what feels confusing is just as useful.
Android Watch support is plannedEnter the Google Account email you use for Google Play. The request is sent from this page.
No email app opens. Your address is used only for beta access and project updates.
No account. No advertising. No subscription needed for the app. Live Bluetooth battery monitoring works offline.