Qalvin BLE


This app has been discontinued. Please use the SRAM AXS app for all power meter firmware updates.


The electronic workhorse of Quarq’s power meter technology, the Qalvin app  now does its job from any Bluetooth-equipped tablet or smartphone — no additional hardware required. Qalvin delivers firmware updates, diagnostics, power meter zeroing and calibration, and is equally useful for bike shops, race teams and riders.

Features & Benefits

  • The fastest way to confirm operation at installation time — instantly on and easy to pair.
  • Update power meter firmware.
  • Check battery voltage.
  • Set zero offsets on multiple bikes quickly and easily.
  • Run advanced diagnostics to check power meter health.
  • Change the power meter’s slope using the built-in calibration routines.

Essential Details

  • Qalvin BLE is available for iOS and Android.
  • Apple devices require iOS 9 or newer and Android devices require Lollipop 5.0 or newer.
  • Qalvin BLE is built for the DZero platform; the previous version of Qalvin remains available for legacy SRAM and Quarq power meters.
  • OmniCal removes the need for recalibration, but it remains in Qalvin for advanced users.

Additional information

Wireless Technology

Bluetooth low energy technology