Düdüğüm is a free safety app developed by HDS Otomasyon ve Yazılım Teknolojileri for Android devices. This app is designed to help users in emergency situations by producing a whistle sound and sending an SMS to pre-set phone numbers to let them know if the user is safe or in danger.

One of the unique features of Düdüğüm is that the whistle sound will continue to play even if the user locks their phone, helping to conserve battery life. This app does not contain any ads and is not designed to collect any data or generate any revenue. It is a purely humanitarian app that aims to help people in need.

Overall, Düdüğüm is a simple and effective app that can be of great help in emergency situations. Its user-friendly interface and useful features make it a valuable tool to have on your phone.