Doesn't work below 2.9m
Since the app claims to turn the Apple Watch into "a precision dive tracker" I think it's fair to complain that it can only do that for up to 2.9m of depth, within ~0.3m accuracy. Below that the depth indications don't change at all, at which point the app becomes just a workout tracker. Such features as max depth setting and the taptic warning when approaching it become entirely useless if the app, or indeed the device, can't reliably track any significant amount of depth. Even though the feature set and ergonomics of the app are good, sadly, without usable depth tracking, I can't give this app a higher rating. Back to using a dive computer :(