iOS app

Install

The web app at submarius.com works in Mobile Safari and supports “Add to Home Screen” as a progressive web app, but the native iOS build offers tighter integration: better background behaviour, native widgets (planned), and lower battery cost during buddy-GPS sessions.

Requirements

iOS 16.0 or later
iPhone (iPad supported but not yet optimised; iPad-specific layouts are on the roadmap)
Cellular or wifi for live data; the app degrades gracefully offline (see features/offline-mode.md)
Location permissions for “While Using” — the app does not request background location except during an active buddy-GPS session

What’s iOS-specific

Push notifications — verdict-change alerts at saved spots, shark-proximity alerts, buddy-GPS pairing requests
Native share sheet — share a spot, a verdict, or a viz report via iMessage, Mail, or any installed share target
HealthKit dive logging (planned) — write dive entries from the catch-log to Apple Health so they appear alongside Activity data
App Clip for the public viz-report submission flow (no install required)
Lockscreen widgets (planned) — today’s verdict at a saved spot

Privacy on iOS

Submarius’s privacy posture is platform-agnostic, but iOS surfaces it via the standard mechanisms:

App Privacy label discloses the categories of data collected (account info, optional location during dive trips, anonymised usage)
Location is requested as “While Using” only; background location is used solely for active buddy-GPS sessions and stops when the trip ends
App Tracking Transparency: we don’t track you across other apps and websites; we don’t display the ATT prompt because we don’t need it.

Subscription management

Subscriptions (Pro monthly, yearly, lifetime) are managed through the Apple App Store.

Subscribe in-app via the standard StoreKit flow
Restore purchases from Settings → Account → Restore
Cancel anytime in iOS Settings → Apple ID → Subscriptions

Bug reports from iOS

If you hit a bug, please file using the bug template. Include the app version (Settings → About in-app) and the iOS version. Attach screenshots if you can — please redact any precise location data.