What apps should I use to find an apartment in Korea?

The main apps are Zigbang and Dabang for rentals and sales, plus Naver Real Estate, which has the widest listings and is what many agents actually use, and KB Real Estate is good for price benchmarks. The challenge as a non-Korean reader is that the apps are mostly in Korean, so a practical approach is to browse with a translation tool like Papago and filter by area, deposit and rent, and type. But here is the realistic advice: in Korea, app listings are often just bait to get you to call, and many good units never appear online. The most effective method is to pick the neighborhood you want, walk into a couple of local real estate offices there, tell them your budget and conditions, and have them show you units, since the agent handles the contract and deposit-protection paperwork. Look for agents experienced with foreigners, as some advertise English service. Use the apps to learn the going rates and narrow your area, then rely on a local agent for the actual deal, and always verify the property registry and protect your deposit with a confirmed date and move-in report.