RV-BMS: Battery Monitor
Lithium battery BMS monitor
Free · In‑App Purchases
See your lithium battery's charge, power and every cell on iPhone, Apple Watch, CarPlay and the Lock Screen. Try everything free in demo mode, no battery needed.
RV-BMS connects to the battery management system (BMS) of your lithium battery over Bluetooth and shows what is really happening inside it: charge level, power, every cell, temperatures and alarms. Built for RVs, campers, vans and boats.
YOUR BATTERY AT A GLANCE
• State of charge, voltage, current and power, updated every 2 seconds
• Time to empty while discharging, time to full while charging
• Every cell voltage, with lowest, highest and cell difference, and which cells are balancing
• State of health, cycles, remaining and full capacity
• Temperatures, charge and discharge status, BMS alarms
ALWAYS UP TO DATE
• Keeps reading in the background and reconnects on its own when the battery is back in range
• 30-day history with charts for charge, power, current, voltage, temperature and cell difference
• Charged and discharged energy for any period, peak power, CSV export
EVERYWHERE YOU LOOK (RV-BMS Pro)
• Live Activity on the Lock Screen and in the Dynamic Island
• Home Screen, Lock Screen and CarPlay widgets
• CarPlay: charge, power and cells on the car's screen, with voice readouts in English, Italian, French, German or Spanish
• Apple Watch app and watch face complications
TRY IT FREE
The iPhone app with your battery, history and export is free. Demo mode shows a simulated battery on every screen, including CarPlay, Apple Watch, Live Activity and widgets, so you can try it all before buying. RV-BMS Pro is a one-time purchase that shows your real battery on CarPlay, Apple Watch, Live Activity and widgets.
COMPATIBLE BATTERIES
• Batteries with the Redodo BMS, used by PowerQueen, Redodo and LiTime (tested)
• JK (Jikong), JBD (Xiaoxiang) and Daly BMS (beta)
Your battery must have a Bluetooth BMS. Close the manufacturer's app before connecting: most BMS accept one connection at a time.
PRIVATE BY DESIGN
No account, no server, no analytics. Everything is read and stored on your iPhone.
RV-BMS is not affiliated with or endorsed by the battery and BMS manufacturers mentioned. All trademarks belong to their respective owners.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Marco Frigerio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Marco Frigerio
- Size
- 11.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- RV-BMS Pro $2.99
- Copyright
- © 2026 MF-Lab.com