my lighter? 
This, initially, was to be my joking question.
But how to find it using a smartphone?
Not using the GPS, it is not as accurate and if you're in a building, it does not work at all.
Exists a kind of thin low-priced chips to be applied to objects and which allows you to send small signals, or something similar?
[Please, do not answer: "stop smoking", I know that, unfortunately
]
This, initially, was to be my joking question.
But how to find it using a smartphone?
Not using the GPS, it is not as accurate and if you're in a building, it does not work at all.
Exists a kind of thin low-priced chips to be applied to objects and which allows you to send small signals, or something similar?
[Please, do not answer: "stop smoking", I know that, unfortunately