The results
suggested that, in addition to the high feasibility of this
method, there were other possible interactions based
on the status of a secondary finger (middle finger in
this study) complementing the main input finger. In
addition, this system is durable in daily life, and it
requires only the magnet sensor already integrated in
smart devices and magnets, which are cheap and
readily available. We converted the magnet into a
wearable and fashionable system by decorating it in an
attractive manner as a nail art component, which was
fixed to a user’s fingernail.