Canceling a friend request on the Facebook app is a simple process. Here are the steps you'll need to follow:
1. Open the Facebook app on your mobile device.
2. Navigate to the person's profile that you sent the friend request to.
3. Tap on the "Friend Request Sent" button located next to their name.
4. Select "Cancel Request" from the dropdown menu.
5. Confirm your decision to cancel the request.
Once you've completed these steps, the friend request will be canceled and the person will no longer be able to see your request or any associated notifications.