You can easily edit a device and delete a device from your account through SweTrack Live. The following article goes through how to proceed, both for mobile and browser.
SweTrack Live for mobile:
Start by first navigating to My Devices that you reach by tapping the icon on the far left in the lower navigation menu. 
Here you get a list of all the devices that you have added to your account.
If you place your finger over the device name and swipe to the left, you will see different options.
Remove your device by pressing on the red trash can. Your device will then be deleted after you’ve confirmed your choice.
If you tap the pin icon instead, you will see where your current device is on the map.
If you tap the device name directly without swiping or tap the arrow icon to the right of the device name, you will open the device settings.
Pressing Edit device opens a page where you can edit the name of your device, set a speed limit, change the symbol that appears on the map, delete history and delete a device. 
Renaming the device
By pressing Name you will have the option to rename your device. Enter any name in the text field, then tap OK.
Speed limit
You also have the option to set a speed limit for your device. This means that SweTrack Live will notify you if the device exceeds the selected speed limit. To select the speed limit, press Speed limit, enter any number, and then tap OK.
Map icon
To edit the symbol that appears when your device is shown on the map, you can tap the Map icon option. You will then get to choose between different icons and then different colors. To see more options, swipe left. To select the icon and color, tap the option you want. The selected option will then increase in size.
To save the options, tap on Confirm.
Delete location- and alarm history
To delete all location and alarm history that is associated with your device you can click on Delete History.
You will now get a popup stating that all your location history and alarm history associated with the device will be deleted from our servers and that they cannot be recreated.
You must then confirm that you have read the information by clicking on the radio box.
Finally, click DELETE to delete all history.
If you do not want to delete all history, click X to return to Edit Device.
Delete device
To delete your device, tap Delete device.
You will then be greeted by a pop-up asking you to confirm your choice. Confirm by tapping Delete device. If you regret it, you can press X in the top right corner, then you will return to Edit Device.
SweTrack Live for browsers:
To edit or delete a device, you can do this by either clicking on a device in the device list on the homepage.
Or you can navigate to My Devices which you reach by clicking the second option in the menu on the left and then click on a device in the device list.
This will open the device settings.
Clicking Edit device opens a box where you can edit the name of your device, set a speed limit, change the symbol that appears on the map, delete history and delete a device.
Rename the device
By clicking Change next to Name you will have the option to rename your device. Enter any name in the text field, then click SAVE.
Speed limit
You also have the option to set a speed limit for your device. This means that SweTrack Live will notify you if the device exceeds the selected speed limit. To select the speed, click Speed Limit, enter any number and then click Save.
Map Symbol
To edit the symbol that appears when your device appears on the map, you can click Change next to Map Icon. You will then get to choose between different icons and then different colors. To select the icon and color, click on the option you want. The selected option will then increase in size.
To save the options, click SAVE below the icons.
Delete location- and alarm history
To delete all location and alarm history that is associated with your device you can click on Delete History.
You will now get a popup stating that all your location history and alarm history associated with the device will be deleted from our servers and that they cannot be recreated.
You must then confirm that you have read the information by clicking on the radio box.
Finally, click DELETE to delete all history.
If you do not want to delete all history, click X to return to Edit Device.
Delete device
To delete your device, click Delete device.
You will then be greeted by a box asking you to confirm your choice. Confirm by clicking Delete device. If you regret your choice, you can click on X in the top right corner and you will return to Edit Device.
Important information about deleting devices
When you delete a device from your account, all data associated with the device disappears. This includes, among other things, position history and troubleshooting data. We therefore ask you to never delete a device that does not work properly as this means that our ability to review log files for troubleshooting purposes disappears. Contact us instead if your product does not work properly. The delete function should only be used when a device, for example, has been discarded or changes owners.