The one and only time I used the app it lost connectivity and left my chuck roast in lukewarm water for who knows how long. Tossed it because I didn't want to kill my family with food poisoning. It's nice if you have a WIFI connected device, so you can put something on the counter in an ice water bath in the morning with the sous vide wand in there and flip it on before you leave work in the afternoon. Also seeing that the water has maintained an appropriate temp during a long cook is nice too. It's a niche case use, but that's why it's nice to have it connected.