#1 best-selling iPad app in US, Japan, UK, Germany, and 17 other countries! Duet turns your iPad or iPhone into the most advanced extra display for your Mac & PC. Developed by a team of ex-Apple engineers, Duet offers unparalleled performance and display quality - all with zero lag. — DO MORE — Be twice as productive by multitasking with two screens. And for those that travel, have a portable way
![Duet Display](https://cdn-ak-scissors.b.st-hatena.com/image/square/8d1f0ecdfc624b57f0158bafafbef7b12bb8942f/height=288;version=1;width=512/https%3A%2F%2Fis1-ssl.mzstatic.com%2Fimage%2Fthumb%2FPurple211%2Fv4%2Fed%2F13%2F98%2Fed139893-c685-784e-6a82-a2b89e49dd5e%2FDuetDisplayAppIcon-0-0-1x_U007emarketing-0-10-0-0-85-220.png%2F1200x630wa.png)