While any restaurant brand's mobile app will get you the deal, if you happen to be signed up with the Shmear Society Rewards mobile app and check-in at the same time, you will get an additional "free bagel and shmear" deal on your account to use on a future visit.
Benefits of the Shmear Society Rewards programs include two points for every $1 spent in-store and a free egg sandwich with any purchase on your birthday.
Photo via Einstein Bros.