From iOS devices: Go to Settings > General > Device Management. Select Forcefield MDM and tap Remove Management. Enter the device passcode if required. Select Remove.
From Android devices: Select Forcefield for Child Device and drag to trash. If prompted, tap Manage Device Administrators and uncheck Forcefield for Child Device. Tap Deactivate. Under “Apps with usage access,” tap Forcefield for Child Device and toggle “off.” You will then need to re-drag Forcefield into the trash. Other Android devices may require you to go to Settings > General > Security > Device administrators > Uncheck Forcefield and tap on Deactivate. Go back to Security, scroll down to “App with access to usage data” and uncheck Forcefield. On the device’s home screen, re-drag into trash.