A referral code can be entered by tapping:
π€β Profile, (top left)
β©β Tap on "Enter invite code"
π’β Enter the referral code!
ββ Note: new members are able to enter in referral codes within 10 days of your signup date.
Things to keep in mind:
πβ If your friend sent you a link to join Drop, the referral code will apply automatically so you can skip the steps above!
πβ If the option to "Enter invite code" is not available, you've either already entered one in or it's past the 10 day window.