Yes. You can enter your Dosh referral code on the app as much as 48 hours after you sign up. You simply need to open your app menu by tapping the three lines on the top left hand corner, then select "Add Referral Code." Type in your promo code and select "Submit Referral Code" to apply. Make sure to add a linked card to get your sign-up bonus. After the 48-hour time frame, this option will go away and you will no longer be able to submit a Dosh referral code.