AlterLock CycleGuardService

What Is AlterLock? - Part 2 Setting

What Is AlterLock? - Part 2 Setting

Hi, my name is Toru, and I’m head of marketing at AlterLock.
In this series, I explain AlterLock in detail from the user’s point of view, answer any concerns you may have before purchasing, and clear up anything you may feel unsure about while using the product. (You can find the previous post in the series at
In this post, I’d like to explain how to pair the device with your smartphone and tell you about various settings. So let’s get to it.

Service contract

Before you can use AlterLock, you need to sign up for the Bicycle Guard Service on the app screen shown below. You can also sign up from any computer or smart device by visiting

There are two payment plans: monthly at ₤3.49 or €3.99 and annually at ₤34.99 or €39.99. The annual plan is great value because it gives you about two extra months of service at no additional cost compared with the monthly plan.

Both plans include a 30-day guarantee of satisfaction. This gives you a free 30-day trial period in which to put AlterLock through its paces. We’re confident you’ll love AlterLock, but if you don’t, you can return the device before the trial expires without getting charged.

Registering your bike

Tap Register Bike to register your bike information.

The maker name, model name, and a photo of your bike are required for this. To make it easy, there’s a wide range of bikes listed in the Main Groupset , and all you have to do is select your bike from the list. But if your bike isn’t listed, you can enter the names and photo yourself. Then tap Register and you’re done!

Pairing with a smartphone

All right, let’s pair the device with your smartphone! We’re using an iPhone, but the procedure is basically the same with an Android phone.

Make sure the device is charged and that you have the authentication code to hand. You’ll find the code on the front of the Start Guide, as shown above, so keep the guide safe. Better still, snap a photo of the code with your phone so you always have it with you if you need to re-pair.

Tap Register Device to start pairing, and then just follow the on-screen instructions.

Finally, enter the authorization code.

And that’s it! Pairing is complete, and you’re now ready to use the device.

Settings overview

To make the device as useful and convenient to use as possible, you can configure various settings according to the situation or your own preferences.

Sensitivity can be set to one of three levels: low, mid, or high. Low won’t react to a slight bump but it will detect movement such as removal of your bike from a bike rack. This is very useful where your bike is one of several in a row and there’s a chance it might get bumped when someone moves the bike next to it.

Next, I’ll tell you about Periodic Information. This feature lets you check the device’s location periodically, even when the device isn’t in tracking mode. In the Device Setting section, you can set a detection interval from 30 to 360 minutes. This interval determines how frequently the device reports its location.

Be careful though: this feature increases the drain on the battery, especially when the detection interval is short. So it’s best to set a long interval—120 minutes or more—and turn the feature on only when you need it.

All right, let’s take a look at the settings in more detail now.

The top section lets you control the alarms. There are two alarms: a low-volume warning and a full, high-volume alarm. By default, the first time the device detects your bike is being interfered with, it sounds the warning; the second time it detects interference, it sounds the full alarm.

This setting lets you make the device sound the full alarm instead of the warning the first time it detects interference. You can also turn the alarms off to take advantage of tracking only, and you can freely adjust the timing and frequency of alarms.

There are a couple of intervals you’ll want to set, so let’s look at those now.

The Waiting time after detection setting in the screenshot above lets you set how long the device waits after it detects interference. The default time of a minute is recommended. The Periodic Transmission setting lets you adjust the positioning interval in the periodic transmission mode, which you can switch on and off in the main setting screen.

And finally, let’s look at the device’s system-related settings.

First off is Button operational range. I’m going to talk about this in detail in the next post, but for now I’ll simply explain that AlterLocK can be switched on and off not only by the app but also by the button on the device. But to stop a bike thief doing this, it’s only possible if the device is within a certain range of your phone. This feature is very useful when you’re in a hurry or when it’s cold and you don’t want to take your phone out to switch the device on or off. Tapping this button lets you adjust the range.

Next is Device ID and Firmware version, which lets you update the device’s firmware.

The device must remain powered during the update otherwise you might brick it. But don’t worry: if you follow the on-screen instructions, the update will be a breeze.

The app also has other features that you’ll find useful as a cyclist, but I’ll leave those for another time.

In the next post, I’m going to tell you about the lock and tracking modes. Talk to you again!