Apps such as ZEDGE allow you to search for "klok" or "clock" directly and set them as your default tone within the app.
Depending on your device or personal style, "klok" can mean several different sounds: klok ringtone download
The "Klock" notification sound is famously found as a stock alert on devices like the Vivo S1 Pro Go to product viewer dialog for this item. Apps such as ZEDGE allow you to search
These include rhythmic "Tic Tic" sounds, cuckoo clock melodies, or mechanical ticking that works perfectly for subtle message alerts. cuckoo clock melodies