In case you are not aware, iPhone Contacts App is well integrated with WhatsApp, which makes it easy to set Custom Alert Tone for WhatsApp Contacts on iPhone.
Set Custom Alert Tone for WhatsApp Contacts on iPhone
Assigning Custom Alert Tones for specific WhatsApp Contacts on iPhone can help in differentiating important WhatsApp Contacts from all other Contacts.
For example, you can assign a Custom Alert Tone to an important Contact on WhatsApp, so that you can immediately know that you are receiving a WhatsApp Message from this particular Contact.
Similarly, assigning a distinct Alert Tones for all Family members in WhatsApp can help in making sure that you check and respond to important Messages from your family members.
Steps to Assign Custom Alert Tone for WhatsApp Contacts
Currently, the only way to assign Custom Alert Tones for specific Contacts on iPhone is by using the Contacts App.
Open Contacts App > select your Contact > On Contacts Info screen, tap on the Edit option located at top-right corner.
On the next screen, select the Text Tone option.
On the Text Tone screen, scroll down to “Alert Tones” section and select the Alert Tone that you would like to assign for this particular WhatsApp Contact.
Tap on Done to save this setting for future calls by this particular Contact on your device.
Now, whenever this particular Contact sends a WhatsApp Message to your iPhone, you will find your device alerting you by playing the Custom Alert Tone that you just assigned for this particular Contact.