Units and settings

Where settings live

Open the Manage tab and tap Settings. The settings home lists everything as cards. Tap a card to open that section. Your choices apply across the whole app, so the tools read in the units and preferences you set here.

Metric or imperial

Dive Kit speaks both metric and imperial, and you can mix them per measurement type. Open Settings → Units to set each one:

Measurement	Options
Pressure	bar or psi
Depth	metres or feet
Volume	litres or cubic feet
Temperature	Celsius or Fahrenheit
Weight	kg or lbs

You picked a starting preset (Metric or Imperial) during onboarding, which set all five at once. From here you can change any single one. For example, you can read depth in metres but pressure in psi if that matches your gear.

The Settings cards

The Settings home lists every section as a card, top to bottom in this order: Appearance, Diving, Gas Presets, Units, Deco Planner, Subscription, Support Development, Submit Feedback, What’s New, About Dive Kit, and Privacy & Legal. Each one is covered below.

Appearance

Sets the look, feel, and language of the app. Two of these toggles also help older phones run smoother.

• Theme: Light, Dark, or Auto. Auto follows your phone’s system setting and switches with it.
• Language: System, or pick one of English, Turkish, German, Swedish, Russian, or Polish. System follows your device language, so the app changes with your phone.
• Decimal separator: how decimals appear in displayed numbers, like a 1.3 bar setpoint. Auto follows your device language (a German phone shows 1,3), or force the dot or the comma. This only changes how numbers look: when typing, every number field accepts both symbols, because your keyboard decides which key it offers.
• Haptic Feedback: tactile buzzes on button presses. On by default. Off if you find them distracting or want to save a little battery.
• Paper Texture: the subtle paper grain on backgrounds that gives Dive Kit its handcrafted look. On by default. Turn it off for maximum contrast in glaring sun, since a flat background is easier to read at low screen brightness on a bright boat deck.
• Animations: smooth transitions and press animations. On by default. Turn them off to make an older or slower phone feel snappier.

Diving

Preferences that feed the calculators. Set them once and every tool reads from them.

• Gas Reserve Rule: Rule of Thirds or Rule of Sixths. This sets how much gas you hold back as a reserve. Thirds keeps one third in reserve (a third out, a third back, a third spare). Sixths is more conservative: you turn the dive after using only a sixth, leaving five sixths for the exit and emergencies. The gas tools use this when they tell you what is left.
• Water Density: Fresh, EN13319, Salt, or Red Sea. Denser water adds more pressure at a given depth, so this nudges depth-based maths. From lightest to heaviest: Fresh (~1.00 kg/L, lakes and rivers), EN13319 (a European dive-computer standard reference, ~1.02 kg/L, sitting between fresh and salt), Salt (~1.03 kg/L, the usual ocean default), and Red Sea (higher salinity, ~1.04 kg/L).
• Treat O₂ as Narcotic: choose whether oxygen counts toward narcosis when the tools estimate equivalent narcotic depth (END). Most agencies treat oxygen as non-narcotic at normal diving pressures, so this is off by default.
• Gas Density Warning and Gas Density Critical: two separate steppers, each in g/L. The deco tools raise a caution flag when your breathing gas density passes the warning threshold (default 5.2 g/L) and a critical flag when it passes the critical threshold (default 6.2 g/L). A denser gas is harder to breathe and raises CO₂ retention risk.

Gas Presets

Manages your saved gas and cylinder presets. Build a gas mix and cylinder once (for example air in an aluminium 80, or your EAN50 deco stage) and it is ready to reuse across the tools instead of re-entering it each time. You can also mark one preset as your default.

Units

Pressure, depth, volume, temperature, and weight, as described in the table above.

Deco Planner

Opens the Deco Planner defaults screen. These are the values every new deco plan starts from: gradient factors (GF), ascent and descent rates, stop configuration, PPO₂ limits, environment, gas consumption, and the CCR rig template. Setting them once here saves you adjusting every plan. The same screen is reachable from inside the planner. See the Deco Planner page for how per-plan overrides work alongside these defaults.

Subscription

Shows your plan status. From here you can switch to a lifetime purchase and restore or manage your subscription.

Support Development

A tip jar. Tap it if you want to chip in toward Dive Kit’s development. It is optional and unlocks nothing extra.

Submit Feedback

Opens a feedback form in your browser where you can report a bug, request a feature, or share what you think.

What’s New

Re-opens the highlights from the latest update. Handy if you skipped the popup and want to see what changed.

About Dive Kit

Shows app information and the version you are running. Quote this version number when you report a problem so it can be reproduced.

Privacy & Legal

This is where you control anonymous analytics and re-read the legal screens.

• Analytics: on by default. When on, the app shares anonymous usage data (which features get used, where things break) to guide improvements. It carries no personal information. Turn the toggle off to opt out completely.
• Review Safety Disclaimer: re-opens the safety disclaimer you accepted during onboarding, plus the privacy and legal information, any time you want to read them again.

How settings flow into the tools

Settings are the defaults the whole app reads from. Change your depth unit to feet and every tool starts showing feet. Switch your water density to Salt and the depth-based maths shifts accordingly. Set your gas reserve rule once and the gas tools apply it everywhere.

The Deco Planner is a special case. Its defaults seed each new plan, but you can override any setting on a single plan without touching your global defaults. That keeps one plan’s conservatism separate from the rest.

Related

• Deco Planner explains per-plan settings versus your saved defaults.