I just put in the market a new version of the application that fixes a serious bug that occurred on a few devices: when the user pressed the button "find" the application crashed with no apparent reason.
This was probably the reason why someone put the following negative review: "dsnt wrk"
Thanks to a very kind user who contacted me via email and later sent the error log I was able to solve the problem within a few minutes. Thanks Tino.
I invite you all to do the same, if you experience any problem or have a good idea tell me and I'll try to meet your needs.