Checkbox++ is a highly configurable single entry Checkbox field that works like toggle switches on iOS or Android applications. You can configure it's on/off text and various UI colors.
Following are some alternative screenshots using different Checkbox++ configuration.
After adding the Checkbox++ field, click on 'Configure' link to open field configuration screen. On the field configuration screen press on 'Edit Checkbox Configuration' highlighted on the below screenshot.
On the newly opened Checkbox Configuration screen you can configure the following properties: