If you lost your phone or you can’t find it, then you can use this app to find it. This is an app that uses your phone’s microphone to listen for a whistle to help you find your device. You can also set the sensitivity of the microphone. The microphone has to be at least the level of the sound you want to be detected. If it’s not loud enough, then it won’t detect it. This is the same for all phones.  If the sensitivity is too high, then the app won’t work. This is because the microphone is too sensitive and it will pick up everything.

The app can be used for two purposes. You can use it to find your phone or you can use it as a ringtone.