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Jasperra Dive is a planning tool for scuba divers who want the numbers for a dive worked out before they get in the water. You choose a depth, set a bottom time and pick a gas mix, and the app computes the no-decompression limit for that profile, the gas the dive will take, the time needed for the ascent plus a safety stop, and the maximum operating depth of the mix you selected. Planning happens on a single live screen. Drag the vertical depth gauge and step the bottom time up or down, then tap a gas-mix chip, and every figure recalculates as you move: no-deco limit, ascent and safety-stop time, gas required measured against your cylinder capacity, turn pressure, MOD and oxygen exposure. Because nothing waits for a calculate button, you can feel how the plan responds — a few extra meters of depth shortening the time you have, a longer bottom time pushing the gas requirement up against what the cylinder can actually hold, a richer mix trading bottom time for a shallower ceiling. Setup keeps the plan tied to your own diving rather than to generic assumptions. Store your preferred units, your breathing rate, the cylinder size you dive and the level of conservatism you want applied, and those values carry into every calculation afterward. Change a setting and the figures follow, so you can see the difference between a relaxed air consumption estimate and a hard-working one, or between a cautious margin and a tighter one. Each plan you are happy with can be saved into a trip log. The log collects your planned dives together and totals them, draws a consumption trend from the gas figures across the trip, and suggests a surface interval for the next dive. Over a week of diving that turns a stack of separate calculations into a record you can read at a glance — what you planned, how your gas use has been running and how long to sit out before going back down. Whether you are sketching out a shore dive the night before, comparing two profiles on the same mix or keeping an organized record across a full trip, Jasperra Dive handles the arithmetic so you can concentrate on the diving. Planning figures are a starting point for your own judgment, your training and your briefing, not a replacement for them.

Jasperra Dive