I don't know if it will help anyone but I also use an App called "Smart App Locker". I utilize an older Droid phone as my permanent Torque screen. It doesn't have cell service enabled (or even a SIM chip). I've always been worried someone will swipe it and then technically have access to my Google account (email, etc...)
The app lets you put a password on all the apps on the device and essentially locks every app including the app store. You can't uninstall anything either. I lock everything out but Torque and maps/navigation. At least if someone gets the device they won't get my data.