Settings

Settings

Customize Submersion to match your preferences and diving style.

Accessing Settings

Tap the Settings tab (gear icon) in the navigation bar.

Units

Configure your preferred measurement units:

Setting	Options
Depth	Meters, Feet
Temperature	Celsius, Fahrenheit
Pressure	Bar, PSI
Volume	Liters, Cubic Feet
Weight	Kilograms, Pounds
SAC	L/min, cu ft/min

Tip: Units are stored per-diver, so each profile can have different preferences.

Appearance

Theme Mode

Option	Description
Light	Always light theme
Dark	Always dark theme
System	Follow device setting

Decompression Settings

Configure the Buhlmann algorithm parameters:

Gradient Factors

Setting	Default	Description
GF Low	30	Gradient factor at depth
GF High	70	Gradient factor at surface

Common Presets:

• Conservative: 30/70
• Moderate: 40/85
• Aggressive: 55/95

O2 Limits

Setting	Default	Description
ppO2 Max Working	1.4 bar	Limit during working portion
ppO2 Max Deco	1.6 bar	Limit during deco stops
CNS Warning	80%	When to show warning

Ascent Rate

Setting	Default	Description
Warning Rate	9 m/min	Yellow warning threshold
Critical Rate	12 m/min	Red alert threshold

Profile Display

Setting	Default	Description
Show Ceiling	On	Display deco ceiling curve
Show Ascent Rate	On	Color-code ascent rate
Show NDL	On	Display NDL on profile

Default Values

Set defaults for new dives:

Setting	Description
Default Dive Type	Pre-selected dive type
Default Tank Volume	Pre-filled tank size
Default Start Pressure	Pre-filled start pressure

API Keys

Enable external services by adding API keys:

OpenWeatherMap

For weather data at dive sites:

1. Sign up at openweathermap.org
2. Get your free API key
3. Enter in Settings > API Keys > Weather

World Tides

For tide predictions:

1. Sign up at worldtides.info
2. Get your API key
3. Enter in Settings > API Keys > Tides

Cloud Sync

Configure cloud synchronization. For a complete guide to syncing across devices — including a free Cloudflare R2 setup — see Multi-Device Sync.

Google Drive

1. Go to Settings > Cloud Sync
2. Tap Connect Google Drive
3. Sign in with your Google account
4. Grant permissions
5. Sync is enabled

iCloud

1. Go to Settings > Cloud Sync
2. Tap Connect iCloud
3. Sign in if prompted
4. Sync is enabled

Submersion uses an app-managed JSON sync file stored in a Submersion Sync folder in your cloud provider. If you switch to a custom storage folder, app-managed cloud sync is disabled and your storage provider handles syncing instead.

S3-Compatible Storage

Sync through any S3-compatible storage provider — Cloudflare R2, Amazon S3, Backblaze B2, MinIO, or a self-hosted server. Available on every platform.

1. Go to Settings > Cloud Sync
2. Tap S3-Compatible Storage
3. Enter your Endpoint URL, Bucket, Access Key ID, and Secret Access Key
4. Tap Test Connection, then Save

See Multi-Device Sync for a step-by-step Cloudflare R2 example.

Sync Options

Option	Description
Auto Sync	Sync automatically when data changes
Sync on Launch	Run a sync when the app starts
Sync on Resume	Run a sync when returning to the app
Sync Now	Manual sync trigger
Last Sync	When last synced

Diver Profiles

Switching Divers

If you have multiple profiles:

1. Go to Settings > Divers
2. Tap the profile you want to use
3. That profile becomes active

Adding a Diver

1. Go to Settings > Divers
2. Tap + Add Diver
3. Enter name and details
4. Save

Editing Your Profile

1. Go to Settings > Divers
2. Tap Edit on your profile
3. Update information:
   • Name, email, phone
   • Emergency contact
   • Medical info
   • Insurance details
4. Save changes

Deleting a Profile

Warning: Deleting a profile removes ALL associated data including dives, sites, and gear.

1. Go to Settings > Divers
2. Swipe left on the profile
3. Tap Delete
4. Confirm deletion

Dive Computers

Manage paired dive computers:

Action	Description
Add	Pair a new computer
Rename	Change display name
Remove	Unpair a computer
Download	Fetch dives

Learn more about dive computers →

Import/Export

Access data management:

Action	Description
Import	UDDF, CSV, or backup
Export	UDDF, CSV, or PDF
Backup	Full database backup
Restore	Restore from backup

Learn more about import/export →

About

View app information:

Info	Description
Version	Current app version
Build	Build number
Licenses	Open source licenses
GitHub	Link to repository
Report Issue	Link to issue tracker

Resetting Settings

To reset all settings to defaults:

1. Go to Settings > About
2. Tap Reset Settings
3. Confirm

Note: This resets preferences only, not your dive data.

Per-Diver Settings

Many settings are stored per-diver:

Per-Diver	Global
Units	Theme
GF settings	API keys
Default values	Cloud accounts
Display options	App version

This means each diver can have their own preferences when switching profiles.