How to Set a Custom Ringtone, Notification, or Alarm on Your Android Phone
YellowTwigs - Tip of the day: notification tones Along with the specific notification “pop-ups” that Knock In Notifications generates for Whatsapp, SMS and email messages received from your VIP contacts, the application
Notification Tones - Apps on Google Play
How to Set Different Notifications Sounds for Different Apps on Android Phones
Notification Tones:Amazon.com:Appstore for Android
Bluey-themed Notification Tones and Ringtones : r/bluey
How To Set A Unique Notification Tone For Each WhatsApp Contact - Techzim