Travellers, be aware that Duet needs a near constant connection to the internet. Weird, because most apps only need to verify the initial use, but Duet has organized it that way that you need it every time you start using your computer/laptop. They were not clear about that till I asked it for the third time (about 25 emails later). I am sailing, right now on the Pacific ocean. The screen of my Mac stopped working. So as soon as on an island, I went to a computer repair shop. There, with a second screen, they could install the Duet app and I installed it on my iPad, as the replacing screen. I bought an Apple certified cable for the Duet connection. Next morning it didnot work. So back to the computer repair shop. Again some hours, and money to this shop. He suspected it needed a constant internet connection. I asked it Duet. The started asking me to do a check. I did. And another, I did, and another, which I did till I went to a next island. And again it stopped working. In stead of writing at sea (what I usually do), I had to write my articles by hand. Again I went to a computer repair shop. Again he connected it temporarily to a screen to make a connection, and again Duet made the connection to the iPad. Again I went to sea, for 10 days, and again the Duet disconnected the iPad screen from the Mac. And again I emailed them and again Duet asked me to do al kind of checks deep into my MAc. So again I went to a computer repair shop, who again suspected that Duet seemed to need a constant connected, so again i asked and again they wanted to continue all knde of checks. Again I asked: does Duet need a constant connection? then the answer finally came out: yes, every time the ipad or mac starts (like when it has gone to sleep mode) the Duet wants to 'authenticate' through internet. Why, I really don't know, because you can do that authentication between de mac and the ipad. So travellers, before you spend 60 Dollars, Duet is only OK if you have constant access to internet. or if you use it for your comfort as a second screen. It is frustrating that I spent so much hours to do all their requested checks, and so much hours up and down computer repair shops and so much money (about 150 dollar) to these shops, before Duet support finally gave a clear response. Also a minus for the support.
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Duet lets you use your iPad or iPhone as an external monitor. With Zero Lag.
