1) IMHO huge deal with the dive computers is the screen type, all lower-end dive computers have same old LCD displays which have the drawback of being invisible

1) IMHO huge deal with the dive computers is the screen type, all lower-end dive computers have same old LCD displays which have the drawback of being invisible if it's dark (wreck, cave, night, or just poor visibility water diving). Most of them have some sort of backlight, but you have to trigger that with a button, which can be dangerous. Seems like computers with OLED screen, which are always visible, start closer to the price tag of Apple Watch 2) I think the author is overselling the "you don't need that much information" point - comparison of Scubapro in dive mode vs Apple Watch in safety stop mode is apples to oranges. During a (recreational, no deco) dive you need exactly these 4 pieces of information that are displayed on the Scubapro: time, depth, no-deco time, and tank pressure (and if the last one is missing it's not because it's not important, it's because you don't have remote pressure gauge which is a separate piece of hardware, and instead you need to frequently reach for a separate pressure gauge that's physically attached to the tank). To be fair I'm sure Apple Watch will display the NDL time in a dive mode, as long as you paid your subscription, so this is critique of the article not the watch 3) Heinrichs Weikamp was already identified in comments of the article, one more company that worked on an open-source dive computer was Liquivision (which I worked for for some time in college). It was eventually bought by Huish, just like Oceanic :)