What are the main online shopping apps in Korea, and which one should I use for what?

Korean online shopping is incredibly convenient with several big players each suited to different needs. Coupang is the king of speed and selection, with Rocket Delivery (로켓배송) bringing items by 7am next day or even same-day on millions of products. Membership (Coupang Wow, 7,890 won/month) gets you free delivery on all orders, free returns, and Coupang Play streaming. Best for: electronics, daily essentials, snacks, baby products, household goods. App is in English. Reviews are extensive but some are paid promo, so look for ones with photos.

Market Kurly (마켓컬리) specializes in premium fresh groceries, gourmet ingredients, and curated brands. Famous for next-morning Saemyeong Delivery (새벽배송) before 7am if ordered by 11pm previous night. Best for: fresh produce, premium meat, organic items, hard-to-find ingredients, wine. Slightly higher prices but quality is excellent. App has English in some sections.

SSG.com (and Emart's online arm) is the supermarket for everyday groceries with same-day pickup at Emart stores or scheduled delivery. Best for: bulk groceries, household consumables, branded items, baby formula. Their Shinsegae Department Store premium items also ship through this app.

Other important apps: Naver Shopping aggregates prices across all sellers (best for price comparison before buying anywhere), Gmarket and 11st (11번가) are eBay-style marketplaces for electronics, fashion, and imports often cheaper than Coupang for non-Rocket items, Musinsa is the dominant Korean fashion app for streetwear and indie brands, Kakao Shopping for gift orders sent to friends' Kakao accounts (huge for birthdays), and Daangn Market (당근마켓) for hyper-local secondhand items in your neighborhood.

Quick recommendations by use case: Need it tomorrow morning, Coupang. Premium groceries, Market Kurly. Want price comparison, Naver Shopping. Bulk household, Emart SSG. Cheap fashion, Musinsa. Imported goods or unique items, Gmarket. Most apps accept foreign credit cards and have English signup options. Start with Coupang Wow membership since the time savings compound across all your shopping. For grocery deliveries, watch for time slots opening at 8pm for next-morning delivery (popular slots fill in minutes during summer).