A project, based in Moscow, aiming to deliver lunch in 8 minutes. We developed a system of bonuses, promo codes and referrals for iOS and Android applications that allow users to get bonus points for registration, first orders, and also for the inviting their to use the app friends through the referral system. We use the phone number for the referral code instead of a random series of characters used in the majority of applications. We think anyone would agree, that it is more pleasant to enter a code in the 900 – 000 – 00 – 00 format, than trying to enter without mistakes something like “bFq3ZJ”.In addition, our team reworked registration process, added functionality for a phone number change and SMS confirmation of the phone number, improved the design of many screens, updated the server back-end and administration panel and implemented many bug-fixes and minor improvements.