A new icon. Steel cylinders can be entered from the numbers stamped on the shoulder: capacity, working pressure and the stamped mass. The app works out the cylinder's buoyancy from them. Every cylinder's mass is now entered without its valve: the stamped figure on steel, the maker's empty weight on aluminium. Changing the mass of an item picked from the list now changes its buoyancy only by what the added or missing material would. Before, the whole difference went into buoyancy, so a lighter item read more buoyant than it is and a heavier one less buoyant. Gear already edited that way is fixed in My gear when the app opens. Cylinders whose standard is not known now come first in the cylinder list.

One new row in Settings: "More apps by the author" opens the author's page on the App Store, where the two dive planners, Turn Pressure and Time to Surface, are listed beside this app. Every figure, screen and refusal is otherwise as in 1.6.

Nothing changes inside the app in this version — every figure, screen and refusal is as in 1.5. What changes is how the app is found: a name and subtitle in the words divers actually type, and separate English listings for the UK and Australia, so a diver looking for a weighting library can find this one.

After your second recorded weight check, the app asks once whether you would rate it. If you enjoy Weights Check, a rating helps it reach more divers and motivates its author to keep improving it. Settings has a new row, Rate Weights Check. It opens the app's page on the App Store, so you can rate it whenever you like without waiting to be asked. No figure moves in this version.

The app is four screens now, on a tab bar: your configurations, your gear, and settings. My gear and Settings both leave the home screen for a tab of their own, so neither is buried and neither is reachable two ways. The library and My gear carry a photograph with the screen's name written on it, and every configuration card is redrawn: the lead you pack by is set apart from the two depth figures, because one is a weight on your belt and the other two are which way the rig leans. Both depth figures wear their column's colour, and a small tag under the shallow one says what that figure rests on — a check you recorded and held, or an estimate. A card's two buttons are now Log check and Check history, and the history of a rig is reachable from the library rather than only from inside the rig. Press and hold a card to reorder your configurations. Screen titles stay readable when a page scrolls under them. Recording a check now asks whether the lead actually held you — neither rising nor sinking — and a check where you did not find neutral is kept but is no longer used to work out your own buoyancy. The optional fields behind "Anything else" carry their names again; two of them had been drawn without labels. One correction moves figures, and it had been asking for less lead than the rig needs. A weight check recorded somewhere other than the shallow stop — deeper, or with fuller cylinders — was being replayed at its own depth and pressure rather than at the stop, so it read as balanced whatever it actually was. Both the headline and the table beneath it now come from one shared reference, and a check taken shallower or emptier than the standard one can no longer reduce the lead the app asks for. Dropping ditchable weight now clears the wing-failure warning as it should. The screen had been subtracting that weight where the calculation adds it, so letting lead go appeared to make the load worse and the warning never lifted.

The balance card is redrawn. The two ends of the dive are halves of one card now, divided by a rule, each centred under its own heading: the 3 m stop with the cylinders nearly empty, and the same rig at depth. The figures are bigger, the columns are colour-coded down into the table beneath them, and what the rig still needs from you is a marked block rather than a line of small print — ticked where a figure clears the one it is compared against, unticked where something is still to be done. Each rig carries a picture of the water it is for, chosen by what the rig is: open water, a stage-carrying rig, or a rig dressed for the cold. The library shows the lead fitted to each rig on its card, so the figure you pack by is on the first screen rather than three taps in. Recording a check and reading its history are both reachable from the balance itself, and a check recorded by mistake can be removed by sliding it out of the history — deleting the current one falls back to the check before it. Cylinder pressures read in round numbers. An aluminium cylinder rated in pounds per square inch was being treated as though it were filled to that rating; it now carries the fill a diver actually gets, while the rating itself stays what the maker stamped on it. One calculation is corrected in this version, and it had been asking for less lead than the rig needs. A rig carrying a stage priced that stage's gas as though the bottle were full at the shallow stop, rather than nearly empty as it is when a weight check is done. Rigs standing on a check borrowed from another rig were affected, as was any rig that gained a bottle after its check was recorded. Nothing you recorded has been rewritten — the check itself is untouched — but the figure a rig shows at the stop may have moved. Recording a check gives you your own measured number in place of an estimate, as it always does.

The balance card is rebuilt. Two columns — the 3 m stop with the cylinders nearly empty, and the same rig at depth — with the estimate's range drawn under the stop, and a tag naming what the figure stands on: your own check and its date, a check borrowed from another rig, or a plan. Under it the rig is itemised in one table: every item, its figure at the stop and at depth, the totals, and one line of what to do about it. Recording a check is shorter. A weight check is 3 m with 50 bar in every bottle, so the app states it instead of asking. Lead moves on the same half-kilo stepper, at the top of the screen, and the check now records the lead you finished with rather than the lead you started with. Check history is a plain list of what you entered, newest first. Pick a mounting and what it implies is fitted with it — a manifolded twinset arrives with its manifold and bands instead of asking you to add a second regulator set. A suit's style, size and undergarment are named on the card and editable in place, without building a second suit. Undergarments are now seven weights of garment, sized to you, stackable, with a top-only option. Dry mass can be edited while you are adding your own gear, from My gear and from a configuration alike. Two calculations are corrected in this version, both of which had been asking for less lead than the rig needs. A check where you added or removed lead in the water recorded the lead you started with; checks you have already recorded are corrected when this version opens your library. And a rig carrying a stage left that stage's gas out of its item-by-item figures at depth. Recording a check gives you your own measured number in place of an estimate, as it always does.

Lead goes on a slider now, in half-kilo steps, and you can write down where it actually sat — which trim pockets, where on the cam band. Wings are a library again: pick one by lift, or add your own. Stages and their regulators are picked under Cylinders, aluminium only, and each bottle states its own mix. Hood, gloves and vest are their own card, chosen separately from the suit. A rashguard is now a suit choice alongside wetsuit and drysuit. Rename a configuration, or start a new one as a copy of your last and name it before it saves. Deleted gear moved off the home screen into Settings, and stays there until you clear it out yourself — nothing empties itself any more. Any figure opens a short breakdown of the numbers behind it, which you can share as plain text. Your whole library exports to one file and imports back through the share sheet; importing replaces what is on the phone rather than merging it. The first time you open the app, a few questions about you build a sample rig already filled in. Equipment figures come from a maintained reference table with a published source behind each one. Two starting-weight calculations are corrected in this version. A manifolded twinset — two cylinders joined by one shared valve assembly — was asking for less lead than the rig needs. A membrane drysuit's buoyancy was not recalculated when the water changed. Both ran toward too little lead. If you dive either of those, recording a weight check gives you your own measured number in place of the estimate, as it always does.