Weights Check

Scuba diving ballast library

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Your rig, your lead, your water — a library instead of memory. Estimates until you record a weight check, then your own numbers. Offline, no account. A diver's lead is not one number. It moves with the water, the suit, the cylinders and the year — and most divers carry it in their head, or work it out again badly at every new destination. Weights Check keeps the record instead: build a rig once from your own gear, record what you actually wore and how it went, and the next dive starts from evidence rather than memory. It is a library, not a calculator and not a verdict on your rig. The arithmetic exists to make the library worth keeping. YOUR GEAR, ENTERED ONCE Cylinders, suits, wings, backplates, regulators, lights and stages go in once, across the seven categories My gear keeps. Lead is not owned but fitted, so it belongs to a rig rather than to the library. Build a configuration by picking from that library, and the tenth rig takes less than the second. First launch builds a sample rig from three questions, to look at before you build your own. PLAY WITH A RIG BEFORE YOU DIVE IT Copy a configuration and change one thing: the suit, the water, single to doubles or sidemount, a stage added, the lead moved from belt to plate. Everything follows — pick a mounting and the hardware it implies is fitted with it — and the copy is yours to change until you dive it and record a check against it. THE BALANCE, DRAWN Every configuration opens on the balance, in two columns. On the left, the 3 m stop with 50 bar left in every bottle: one signed figure on a bar running sinks to floats, with the estimate's band on it. On the right, the same rig at depth: what it would take to swim up if the wing failed, and whether the wing you fitted has the lift. A tag says what the figures stand on — your own check and its date, a check borrowed from another rig, or a plan. THE RIG, ITEM BY ITEM Under the balance, the same dive itemised: every item of the rig, what it is worth at the stop and at depth, the gas in the back cylinders and in every stage, the totals with and without the lead you fitted, and one line of what to do about it. ESTIMATES UNTIL YOU CHECK, MEASUREMENTS AFTERWARDS Before you have recorded a weight check, a suit's buoyancy comes from a published-material estimate, your body from your weight, height and sex, and the answer prints as a range it says is an estimate. Record one real weight check — 3 m, 50 bar in every bottle, and the lead you finished the check with — and the range narrows around what your own rig actually did. Recording checks is what turns the estimates into your numbers; nothing else does. WHERE IT STOPS It does not replace the weight check you do in the water — that check is the authority, and the app exists to remember it, not to stand in for it. It is not a dive computer, it runs no decompression calculation, and it is not a substitute for training. Where it cannot answer, it says so rather than printing a number with a caution underneath: a stage bottle that has not said what size it is, what it is filled to or what is in it is refused outright and explained rather than guessed at. Above a load you set for yourself it warns. Below that load it shows you the signed number and nothing more. There is no verdict on a diver anywhere in this app. EVERYTHING ELSE • Weight positioning recorded — where the lead sits, and what is ditchable • Every check kept, newest first, with what you entered on each one • Metric and imperial, switched app-wide, converted at the point of display • A dived-but-unrecorded rig waits at the top of the library • Deleted gear waits in Settings until you clear it out yourself — nothing empties itself • Equipment figures come from a maintained, sourced reference table • No account, no ads, no analytics, no network access of any kind, and works with no signal at all Your training and your own weight check in the water decide what you dive. Weights Check keeps the record and does the arithmetic beforehand.

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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 developer, RUSTAM ISMAILOV, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    • RUSTAM ISMAILOV
    Size
    • 10 MB
    Category
    • Sports
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    9+
    Copyright
    • © 2026 Rustam Ismailov