Voltsure: Battery Monitor

Track batteries, with CarPlay

Free · Designed for iPad. Not verified for macOS.

Know your leisure, starter or marine batteries at a glance. No account, no tracking, no location. Your readings never leave your device. Designed and built in the UK. See every battery on your iPhone and in CarPlay. Voltsure reads BM2, BM6 and BM7 Bluetooth battery monitors, and Victron Smart devices, with no account and no tracking, and your readings never leave your phone. Put a monitor on the leisure battery and another on the starter, then add a second van, a caravan or a boat. See each battery's voltage, whether it's charging, rising, stable, falling or low, and an estimate of how much charge is left. Open a battery to see its last 24 hours, 7 days or 30 days, with charging periods shaded and your low-voltage alert marked. PRIVATE BY DESIGN • No account or sign-up • Works fully offline, and your data is never sent anywhere • Never asks for your location • No ads, analytics or tracking • Designed and built in the UK HONEST ABOUT THE NUMBERS BM2, BM6 and BM7 monitors measure voltage, not current. Voltsure is clear about that: charge is shown as an estimate, with "under load" and "settling" when the voltage reads low or high. EVERY MONITOR, EVERY BATTERY • Reads BM2, BM6 and BM200 monitors side by side, plus the BM7 / BM300 Pro and intAct Battery Guard (experimental) • Add as many batteries as you like, free • Each battery keeps its own name, battery type and alert level • Every connected monitor reads at the same time ALERTS BEFORE A BATTERY RUNS FLAT Get a notification when a battery stays below its alert level for five minutes, even through Focus. Set the level for each battery, with sensible defaults for lead-acid, AGM and lithium (LiFePO4). Alerts work while your iPhone is in Bluetooth range; if a falling battery goes out of range, Voltsure tells you alerts have stopped. HISTORY THAT CATCHES UP Your monitor logs a reading every two minutes. Voltsure downloads that history whenever it reconnects, so the charts fill in after time away. YOUR WHOLE POWER SYSTEM (PRO) Add solar chargers, shunts, DC-DC and mains chargers beside your batteries, and see how they connect on a map of your van, motorhome or boat. Victron Smart solar chargers, shunts, Orion DC-DC and mains chargers show their live readings while Voltsure is open, with no extra hardware: Voltsure reads what they already broadcast, using each device's key from VictronConnect. See solar in and energy used day by day. MADE FOR LIFE ON THE ROAD • iPhone, iPad and Mac • CarPlay: check your batteries on the dashboard (Pro) • Home Screen and Lock Screen widgets, and a Live Activity while you drive (Pro) • Group batteries by vehicle, with number plates (Pro) • Export and import your readings as CSV (Pro) VOLTSURE PRO, ONE-TIME PURCHASE Unlimited batteries, live voltage, charge estimates, 24-hour history and alerts are free. Voltsure Pro unlocks CarPlay, widgets, the Live Activity, 7 and 30 day history, the Power System, vehicles, export and themes. Pay once: no subscription, shared with your family. Works with BM2, BM6 and BM200 battery monitors, all tested with Voltsure. Support for the BM7 / BM300 Pro and the intAct Battery Guard is experimental: built from their documented Bluetooth protocol, not yet tested on a real monitor.

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Voltsure 3.8 is the biggest update yet. YOUR WHOLE POWER SYSTEM (PRO) • Add solar chargers, shunts, DC-DC and mains chargers beside your batteries, and see how they connect: as a list, an energy-flow map, or a map of your vehicle from above. • Victron Smart devices show their live readings, with no extra hardware. A step-by-step guide shows where to find each device's key. • A Devices tab with every battery and device across your vehicles. • History → Energy: solar in and energy used, day by day. • Victron devices in CarPlay, under their vehicle. ALERTS YOU CAN RELY ON • Low-voltage alerts are Time Sensitive, so they come through Focus. • If a falling battery goes out of range, Voltsure tells you its alerts have stopped. ALSO NEW • Battery pages: pick a day, summary tiles, and BM6 temperature and charge graphs. • BM7 / BM300 Pro monitors (experimental). • No limit on how many batteries you add. • Battery voltages grow with your text size. • How It Works: search and common questions. • A battery's last voltage still shows after its monitor has been away a day. • If Voltsure's data can't be opened, it restores your batteries and setup from a daily backup.

Version 3.8.0

The developer, MATTHEW GARDNER, 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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    MATTHEW GARDNER
    Size
    43.9 MB
    Category
    Utilities
    Compatibility
    Requires iOS 18.5 or later.
    • iPhone
      Requires iOS 18.5 or later.
    • iPad
      Requires iPadOS 18.5 or later.
    • Mac
      Requires macOS 15.5 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.5 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © Matt Gardner
  • Developer Website
  • Privacy Policy

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