It's an app for smartwatch, it can detect out the Bluetooth connection range of mobile.

When going out, I always have a watch, but isn't mobile left? I'm sometimes sent. When being reverse, that wouldn't be a problem so much and.

How to use:
When turn on, watch by stationing. It's the specifications for resident service of Android that notice goes out, so please be sure to pardon the first time. Notice "opens", when it's pushed, the screen by which-> "connection"-> is "Bluetooth" holds "setting", and notice is closed.

The specification:
Notice of cutoff (Of a cloud icon, backslashed.) is the same possibility as indicated timing from the system side, but it's every 20 seconds at the timing of a resident watch, so it's notified of in the mean time. When cutoff is detected once, it's notified of every 20 seconds. just a little bit annoying, because I think, but it's left and it's an app of prevention. A message indicates that it's connected once again in a toast.

Additionally:
I thought there was also an app like this, but then the model (WSD-F30) didn't correspond, and I came to my own making. It's in my first Android Studio.