KnocKnocK is the NO. 1 On-Demand Dry-Cleaning & Laundry App in Singapore! In 20 seconds, you can put your laundry order via the App or Website. Our well-trained Woodpecker (worker) will come to collect your clothes at your doorstep, and it's all FREE, no extra-charge! Why KnocKnocK? Better Quality. Handpicked local dry cleaners with 30+ years' experience.