We verified whether users could recognize the time by our
vibration watch using smart phone. We used five times (21:18,
05:49, 19:11, 12:53 and 08:24) for the experiment. These times
consist of numbers which participants can recognize easily or
not. The participants felt the vibration corresponding to the
hour or the minute, and answered the number corresponding to
it orally. This experiment is the same as was performed earlier
using a mobile phone [2]. From the result of the experiment of
some exhibition we thought that there was no difference in the
recognition rate of visually impaired people and non-disabled
people. So, for the present experiment, we chose the nondisabled
people who participated in the previous experiment in
order to provide a more direct comparison of a mobile phone
and a smart phone.