Best ebike GPS tracker and alarm: 4 picks, plain facts

E-bikes cost a lot and are attractive to thieves, so a hidden tracker or an alarm is a sensible add-on. Here are the facts that matter before you choose: how each device finds the bike, what powers it and whether there is a subscription.

What to look for

1. How it locates. Bluetooth and a phone network (such as Apple's Find My) only work where other phones pass by. A GPS tracker with its own network connection reports from wherever it is.
2. Subscription. A GPS tracker with a data connection often needs a plan. Check how long the first plan lasts and what renewal costs.
3. Battery life. Makers quote a range, and results depend on how you use the device. Note whether it recharges or takes a coin cell.
4. Phone compatibility. Apple's Find My works with iPhones. Check the maker's page if you use Android.
5. Where it hides. A device under the bottle cage or behind a mudguard is harder for a thief to find.
6. Weather rating. An IP rating tells you how it copes with rain.

Our picks

Knog Scout Bike

• Why: An alarm and a finder in one small device, so it deters and helps recover.
• Key spec: Knog lists an 85 dB motion-sensitive alarm, Apple Find My location, IP66 water and dust resistance, USB-C charging with a 2 to 6 month battery depending on use, and a 2-year warranty.
• Check: Find My means this is for iPhone users. The alarm sends a notification to your iPhone when it is within Bluetooth range.
• Source: Knog.

Invoxia Bike Tracker

• Why: A GPS tracker built for bikes, which does not rely on other phones passing by.
• Key spec: Invoxia lists a battery life of up to 3 months, a 2-year warranty, and a 3-year network subscription included with the tracker. It locates using Bluetooth, Wi-Fi or GPS and sends the position over low-power Sigfox or LoRa networks.
• Check: It relies on those networks, so use Invoxia's coverage information to confirm service in your area before you buy. Invoxia also lists optional subscription plans of 1 month, 1 year and 3 years.
• Source: Invoxia.

Apple AirTag

• Why: A small, widely supported finder that uses the Find My network.
• Key spec: Apple lists IP67 water resistance, a user-replaceable CR2032 coin cell battery, and says the AirTag works for more than a year on a standard battery.
• Check: An AirTag has no GPS and relies on nearby Apple devices to report its location. It also needs a holder to attach it to a bike.
• Source: Apple. Battery steps: Apple Support.

Elevation Lab TagVault Bike

• Why: A bottle-cage mount that looks like ordinary hardware.
• Key spec: Elevation Lab lists a 26 g body, bolts to standard bottle cage mounting points, stainless Torx security screws with a T20 driver, and IPX5 waterproofing.
• Check: The AirTag is sold separately. Confirm that your frame has bottle-cage bosses, and check the fit in tight frames.
• Source: Elevation Lab.

How to fit and use a tracker

• Install it where a thief is least likely to look, and keep it out of the battery's way. Do not alter the bike's wiring or battery.
• Register the device in its app and test the alarm or location before you rely on it.
• Charge or replace the battery on a schedule. Put a reminder in your calendar.
• Keep the app's notifications on, and note the serial numbers of the device and the bike in case you need to file a report.

FAQ

Do I need a subscription? The AirTag and Knog Scout use Apple's network with no plan listed on the makers' pages. Invoxia's GPS tracker comes with a 3-year network subscription, and then you choose a plan.

Will a tracker stop theft? No. It helps you find the bike. A good lock is still the first layer.

What should I do if a tracker shows my bike? Contact the police and share the location. Do not try to recover the bike yourself.

Does an alarm work if the bike is moved? Knog says the Scout's alarm is motion-sensitive and sends a notification to your iPhone within Bluetooth range.