It’s really simple!
Once you've downloaded the Flashfood app, and create your account you can start browsing deals near you right away.
You buy items directly from your phone, and head over to the store any time of the day to pick up your order. Your items will be located in the Flashfood zone (it's usually near the customer service desk). If you need any help ask someone in-store, they'll be happy to guide you to the fridge!
Once you've picked your items, head over to the customer service desk to confirm your pickup. And voila you're done!