Do you have experience that did not call a clerk in the pub?

・Case that does not come easily clerk in the pub
・Case you cannot call a clerk , because you are shy
・Case voice wither, wheezing

When such case, if you use this app, "Ding Dong!! Ding-Dong!!", you can call a clerk! maybe...
This app is a very simple app!

If you are a Shop owner, Put QR code to the your shop !
http://tecc0.com/DingDongQR.gif

This app makes your shop button ! LOL