This week version 1.40 of Google's Gboard became available to iOS users, bringing them the haptic feedback feature that Android users have always had natively on their devices.
If you have an iOS device, you've had Taptic Engine on your phone, but not the conventional haptic feedback feature that Android-users have long known. The difference is that Apple's Taptic engine will only vibrate your device in specific situations mostly related to alerting you to something like a text message, app, notification, or phone call.