AlterLock CycleGuardService

Android app (2.2.17) is now available!

The Android version of the app (2.2.17) with the following updates was released on December 22, 2021.

  • Adjusts the detection sensitivity of the accelerometer
  • Added 12 hours and 24 hours to the periodic transmission interval
  • Added the option to reduce battery consumption by the app.

Adjusts the detection sensitivity of the accelerometer

The detection sensitivity of AlterLock Gen2 devices has been improved to achieve higher sensitivity and reduced false positives.

The latest firmware version 1.3.29 improves the problem of false positives on some devices when the sensitivity setting is set to High.

In addition, the settings for each sensitivity have been adjusted to make the device more sensitive to movements other than tilt.

To reflect the improved sensitivity setting, change the sensitivity setting and then change it back to the original setting.

How to update the firmware

  1. Firmware update must be performed with the USB cable connected and the red or blue LED lit.
  2. On the app's main screen, tap [Device Settings] > [Device].
  3. On the device screen, tap [Firmware Update].
  4. The firmware update takes about a minute to complete.

Troubleshooting when updating firmware

  • If an error occurs with the firmware update, unplug the USB cable, press and hold the button on the device for 10 seconds, and try updating again.
  • If the device does not reconnect after waiting 20 seconds after the firmware update is complete, press the button on the device for 2 seconds and tap the reload button in the upper right corner of the main app screen.
  • In the environment where multiple Bluetooth devices are connected at the same time, the update may fail in the middle. Please disconnect from other Bluetooth devices before trying to update.

Added 12 hours and 24 hours to the periodic transmission interval

Newly added 12 hours and 24 hours to the periodic transmission interval.

The maximum has been 6 hours, but by adding a longer time interval, you can transmit the location of your bike once or twice a day without being aware of battery consumption.

This is not based on the exact time, so there may be a discrepancy of a few minutes to a dozen minutes.


Added the option to reduce battery consumption by the app.

Battery Saver

Tap [Battery Saver (Off)] from the app menu to enable the function.

Enabling Battery saver stops Bluetooth scanning in the background to save your phone's battery.
To reconnect with your AlterLock device, you can either view the app or disable Battery saver again.

Pending Intent Scan option

*Compatible with Android 8 and above

In the app menu, go to [Advanced Settings] > [ Pending Intent Scan] and enable it.

Changes the Bluetooth scanning method to improve the battery consumption of your smartphone when the app is running in the background.

If you notice that the battery consumption is noticeably faster after installing the app, please try this option.


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