wycaa is a booking app for car washes, auto detailers and mobile car washers in Argentina. Each business gets its own booking link, where clients choose their vehicle by make and model, pick an open time slot and leave their name and WhatsApp number, without creating an account or installing an app. wycaa places each vehicle in the category the business defined, with its price and duration. Businesses with more than one bay can take several cars at the same time, set day by day, and mobile washers define service areas by neighborhood or by a radius on the map, with the days they visit each one. Bookings can require a deposit of half the price or full prepayment through Mercado Pago, in Argentine pesos. wycaa also creates an Instagram story image with the open slots, prepares WhatsApp reminder messages that the business sends with one tap, and lets clients confirm attendance, which notifies the business. It runs in the browser and installs as a web app with push notifications.