
Fogstar
Bluetooth battery monitor
0 ratings
Free
About
Fogstar Drift is the companion app for Fogstar Drift lithium (LiFePO4) leisure batteries. It connects to your battery over Bluetooth and shows you exactly what it's doing – at a glance on the dashboard, in detail down to each cell, and over time in History.
LIVE DASHBOARD
• State of charge, voltage, current and power
• Remaining capacity, cycle count and temperatures
• Whether the battery is charging, discharging or resting
CELLS
• Every cell's voltage, the spread between highest and lowest, and when the BMS is balancing
• A cell drifting out of balance is the earliest warning you get – long before the battery lets you down
HISTORY
• Readings recorded automatically while you're connected
• Charts of charge, voltage, current and temperature over hours, days or months
• Up to 90 days kept on the phone; export it all to CSV
ALERTS
• Low charge, high or low temperature, winter guard and protection trips
• Set your own thresholds and quiet hours, so nothing wakes you at 3am
MORE
• Multiple batteries and battery banks in one app – see the whole system totalled, or drill into any single pack
• Tools for real installs: battery recovery for a pack that won't wake, connection diagnostics and a timestamped event log
• Report a problem in one tap – the app sends Fogstar a full diagnostic bundle with a reference number, so we can help without the back-and-forth
PRIVACY
No ads, no tracking. Everyday monitoring is Bluetooth only – your battery's data never leaves your phone unless you send a support report. Cloud features run on Amazon Web Services in Europe.
Works with Fogstar Drift batteries fitted with the Bluetooth module. If anything isn't right, use Report a problem in Settings and we'll take a look.
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What's New in Fogstar
1.37.80
September 20, 2026
- Fixed some batteries getting stuck connecting and disconnecting every few seconds. The app now recognises when a battery is refusing the unlock and recovers properly — correcting the address it uses, or asking for the PIN — instead of looping.
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