How does a supplements and health store in the UAE get repeat customers?

By reaching the customer at the moment the first purchase runs out, through a channel that does not charge per message. Almost every store has the timing data and spends the reach budget anyway.

The mechanics of a second order

Work out the median gap between first and second order. Whatever that number is, the reminder belongs slightly before it — after it, the customer has already solved the problem somewhere else.

Winning a customer costs money and selling to them again costs almost nothing, and most budgets are spent as though the reverse were true. For a supplements and health store in the UAE, the answer turns on one thing in particular: Subscription behaviour without a subscription: people finish a tub and reorder, often on the same day of the month.

What is different about the UAE

Delivery expectations in the UAE are set by same-day services, so five-day shipping reads as slow whatever the price.

Card payment is the norm in the UAE, with cash on delivery still expected by a meaningful minority.

What is different about a supplements and health store

Discounting to grow trains people to wait for the discount. It works once.

Where a mobile app comes into it

Reorder reminders are the whole opportunity, and they are free through an app and paid through anything else.