NotifyWho is an Android app developed by travisjayday that allows you to customize your notifications for WhatsApp messages. With NotifyWho, you can easily know who is texting you without even looking at your phone. Simply select a contact, then choose a notification sound and/or vibration. Whenever that contact sends you a message over WhatsApp, the specified sound and vibration will play.

One of the best features of NotifyWho is the ability to give each of your contacts an individualized sound and vibration pattern. This means that you can easily distinguish between messages from different contacts without even looking at your phone.

In addition to customizing your notifications, NotifyWho also allows you to set default tones and vibrations. You can even create your own vibration patterns if you upgrade to the Premium version. Plus, you can load your own notification sounds if you have a Notification/Sound Picker installed on your device.

Overall, NotifyWho is a great app for those who want to never miss a WhatsApp message from that special someone. Download it now from the Google Play Store for free.