The app asks for your breathing rate once, and now offers all three ways to answer it: from a dive you did, the number off your computer, or a tier. There is a way past it too — skip for now and it plans on the typical tier, marked as a preset rather than as yours, until your first logged dive replaces it. The starting fill now ends at the cylinder's own rating. An 11.1-litre aluminium 80 stops at 207 bar and the steels at 232, so a plan can no longer be funded on gas the cylinder cannot legally hold. Minimum gas does not depend on the fill, so this shortens dives rather than reserves. Settings says each thing once. Every footer is one line you act on, and what is true but read once now sits behind the (?) in its section heading — which opens as a full sheet at large text sizes, so it can be read to the end.

The ascent is now a ladder of levels, not a slow drift. Half your depth, then 5 m, with a middle level on some plans — each with its own time and depth on the chart, and each one a depth to hold or be shallower than. A plan you can brief and check a computer against. A dive the no-stop limit ends no longer surfaces with gas to spare. The plan spends the remaining gas at 9 m, where coming off the deep segment the gas runs out long before the nitrogen does. Deep dives on big cylinders gain the most. Ascent rate is now a setting, 3 to 9 metres a minute, default 9. The reserve follows it: plan a slower ascent and the reserve grows, and it never falls below the 9 m/min figure. The Minimal Decompression Profile keeps its own prescribed ascent. Minimum gas now covers the whole ascent. It used to be worked out as far as the safety stop, which left the last five metres unfunded; it runs to the surface now. And ascent time is charged exactly instead of rounded up to the whole minute, which removed a jump in the reserve between neighbouring depths. The two changes mostly cancel: from 30 m it is still 64 bar out of a 15-litre steel and 86 out of an aluminium 80; from 40 m the reserve is 2 bar higher. Maximum operating depth now states the fact about the gas: air reads 56 m at ppO2 1.4. The app still plans no deeper than 40 m. The plan screen was redrawn — sliders for depth, time and fill, a depth label on every step of the profile, and the card says plainly what ends the dive. Your reserve funds a straight ascent at the rate you planned. It is not a budget for a slower one.