Your battery data stays yours.
Last updated November 9, 2026
Direct Bluetooth monitoring works locally without a MultiBMS account. Optional Pro remote access sends gateway battery data through the MultiBMS relay server so your app can view it away from home.
What MultiBMS accesses
- Bluetooth device data: device names, signal strength, and live BMS telemetry such as voltage, current, temperature, state of charge, capacity, cycles, and cell voltages.
- App preferences: locally saved settings such as connected devices, groups, display choices, ride profiles, polling interval, temperature unit, and alert thresholds.
- Optional Watch sensors: if you enable Ride or Race features, Apple Watch can use location and motion sensors for speed, distance, and G-force on your paired devices.
- Purchase status: Apple or Google reports purchase status for optional skins and subscriptions. Pro entitlement verification also uses RevenueCat and the MultiBMS relay service.
What MultiBMS does not collect
- No MultiBMS user account, name, email address, or phone number.
- No advertising identifier, behavioral tracking, or third-party ads. Compatible builds can show an occasional in-app offer for MultiBMS Pro, which can be turned off in Settings.
- Direct Bluetooth monitoring does not require uploading battery telemetry to the MultiBMS relay. Enabling remote gateway access changes that data flow, as described below.
- No sale of personal information.
Website downloads
We count completed responses for each firmware or guide download by file and day. The counts do not identify individual visitors or track installations.
Optional gateway and Pro remote access
A gateway connects to supported Bluetooth batteries and your Wi-Fi. Local-network access connects the app to the gateway. With remote access enabled, the gateway and app communicate through the MultiBMS relay server. The service processes gateway identifiers, connection credentials, battery telemetry, and subscription entitlement information to authenticate access and provide the remote connection. Store and entitlement services process purchase-related identifiers and status. Server operations also involve connection information such as IP addresses. Remote access is optional.
Storage and deletion
Battery monitoring works locally on your phone and paired Apple Watch. Live telemetry and short history are held on-device. Preferences, saved devices, groups, profiles, and unlocked-skin status are stored locally. BMS credentials are kept in the operating system's secure storage. Uninstalling MultiBMS removes its locally stored app data; it does not by itself remove a gateway’s saved settings or server-side gateway and entitlement records. Contact support@multibms.com about server-side data or deletion requests. Operating-system backups and store purchase history remain subject to Apple or Google policies.
Purchases and third parties
Optional one-time purchases unlock cosmetic visual skins. Optional Pro subscriptions provide remote gateway access through our server; gateway firmware and local-network viewing are free. Apple App Store or Google Play processes the transaction and may process account, payment, and transaction information under its own privacy policy. MultiBMS receives purchase status, not your payment-card details. Core battery monitoring does not depend on a skin purchase.
Bluetooth and location permissions
Bluetooth permission is used to scan for and communicate with compatible BMS hardware. Some Android versions label Bluetooth scanning as a location-related permission; MultiBMS does not use that permission to build or upload a location history. Apple Watch location and motion permissions are used only for Ride and Race features you choose to run.
Children
MultiBMS does not knowingly collect personal information from children. We do not serve third-party ads in the app.
Changes and contact
This policy may be updated as MultiBMS changes. The date above identifies the latest version. Questions can be sent to support@multibms.com.