A free program for Android, by EliasWilliam.
With Miitary Helicopter Sounds, you can play the best and most realistic helicopter sounds on your Android device. There are more than enough helicopter sounds to choose from.
You will find military helicopter ringtones, as well as some others such as Chinook, Bells, and more. All of them are high quality.
The best part is that you can download these sounds to your phone and use them without having to connect to the Internet.
How to use the app
Once you have downloaded it, you can open the app and select a ringtone to set as an alarm.
You can also set it as a notification for your phone or tablet.