That would depend on what yu device it. If it is a computer related device then a virus or malware.
tutuapp cannot harm your device in any way.
Yes, the noun 'safety' is a common noun; a general word for a state of being protected from potential harm (an abstract noun); a general word for a device designed to protect and prevent harm (a concrete noun).
Balancing of slave and free states.
A device/feature that is designed to, in some kind of failure (such as on a train) will cause no or limited harm to other devices or people (i.e. applying brakes on the train).
The rumble device is designed to - encourage you to reduce your speed - alert you of a hazard approaching
A guard is a device designed to prevent injury from rotating machinery.
fuse is a safety device because it dosnt harm us.
the compromise of 1850
the compromise of 1850
A computer is defined as an electronic device that is designed to accept data.
An ergonomic device is a device that is "designed for the safe and comfortable interaction between human beings and machines."
The mason dixen line