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, Backup, Subscription, Rate Dive Kit, Submit Feedback, What’s New, About Dive Kit, Support Development, 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, Polish, Simplified Chinese, or Korean. 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: Thirds, Fourths, Fifths, Sixths or Fixed. This sets how much gas you hold back as a reserve. Thirds keeps one third (a third out, a third back, a third spare). Fourths, fifths and sixths keep progressively more, which is what cave divers use when flow, distance, or team rules call for a bigger margin. Fixed keeps a pressure you type, in bar or psi, whatever the cylinder holds: the open-water habit of “be back on the boat with 50 bar”. Picking Fixed reveals the target field right below the chips. The gas tools use this rule when they tell you what is left, and Gas Usage turns it into a turn pressure.
• In the Deco Planner, any single gas can carry its own reserve target instead of following this rule. It lives under Advanced in the gas edit sheet, and it changes that cylinder’s low-gas warning, the target the Bottom time finder solves to, and the CCR bailout reserve check. See the Deco Planner page.
• Water Density: Fresh, EN13319, Salt, or Red Sea. Denser water adds more pressure at a given depth, so this nudges depth-based maths. Approximate densities, lightest to heaviest: Fresh (1.000 kg/L, lakes and rivers), EN13319 (a European dive-computer reference, 1.020 kg/L, between fresh and salt), Salt (1.025 kg/L, the usual ocean default), and Red Sea (higher salinity, 1.040 kg/L). The deco planner reads this same setting, so changing it here updates the deco planner’s water density too. The buoyancy calculator keeps its own separate water setting.
• 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.
• Water temperature: the reference every gas-density figure is computed at, in °C or °F. Default 15 °C (59 °F). Gas thins as it warms, so a warmer setting reports a lower density. It is density only: the Bühlmann model has no temperature term, so no stop moves, and the 5.2 and 6.2 g/L limits are published figures that stay put, which means a warmer setting warns a little deeper. Use the temperature you expect at your deepest level, not at the surface. This is not the Gas Blender’s fill or ambient temperature. The Deco Planner reads the same value in its Environment section.

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 EANx50 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.

Backup

Saves everything Dive Kit keeps on your device to a single file, and restores it again. Your settings, profile, certifications, gear, saved deco plans and checklists all travel together, so this is how you move to a new phone or keep a copy before you change something large. On iPhone and iPad it can also keep that snapshot current in your own iCloud Drive. See the Backup and restore page for what is included, what is deliberately left out, and how a restore behaves when it fails part way.

Subscription

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

Rate Dive Kit

Opens the App Store or Play Store listing so you can leave a rating. Nothing is sent from the app itself.

Submit Feedback

Opens Dive Kit’s feedback board at divekit.featurebase.app in your browser. Report a bug, post a feature request, or vote on requests other divers have already made.

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.

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.

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.