Appp.io - Cuckoo Sounds is a free Android application that provides a collection of cuckoo sounds and ringtones for users. The app is straightforward to use, and its main feature is the ability to play and stop cuckoo sounds randomly. The cuckoo is known for its unique hollow-sounding voice, and this app provides an extensive range of sounds for users to enjoy.

The app is offline, which means that users do not require an internet connection to use it. It also comes with a favorites feature, allowing users to save their preferred cuckoo sounds for easy access. Additionally, the app has an auto replay feature, ensuring that users can listen to their favorite cuckoo sounds repeatedly. Lastly, users can set cuckoo sounds as their ringtone, notification, or alarm clock tone.