Mobile App for a Pharmacy Chain

We operate a regional chain of pharmacies and want a mobile app that turns occasional walk-in customers into regular ones. Today people call each branch to ask whether a medicine is in stock, and often drive across town only to find the shelf empty. The app should let a customer search for a specific drug or its analogue and immediately see which nearby branches have it, with quantity and price.

Once a medicine is found, the customer should be able to reserve it at a chosen branch for pickup within a set time window, without prepayment. Staff receive the reservation, set the item aside, and the customer gets a confirmation. We also run a loyalty program with a plastic card that most people forget at home, so the app must carry a digital loyalty card with a scannable code and a running balance of bonus points.

Finally, we want gentle reminders: a customer on a course of treatment can set a schedule and receive local notifications when it is time for the next dose or to restock. Please cover both iOS and Android, describe how you would connect to our stock system through an API, and how you protect personal and health-related data. We value a calm, readable interface over flashy design, because many of our customers are older.