LYFE Offshore
Silent watch. Loud alarm.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Quiet when it should be. Loud when it matters.
LYFE Offshore is a marine alarm monitor that watches your NMEA data so you don't have to. Sleep at anchor. Stand the night watch. Focus on the boat. LYFE wakes you for the things that actually matter — and stays silent for the rest.
Built by a sailor and engineer with years of offshore experience, LYFE is the alarm clock you wish your chartplotter had.
CORE FEATURES
AIS Watch — Real-time collision detection from AIS targets. Set your CPA (closest point of approach) and TCPA (time to closest point of approach) thresholds. LYFE alerts you when a vessel is on a converging course, with full details: range, CPA, TCPA, bearing sector and vessel name.
Anchor Watch — GPS-based anchor drag monitoring with configurable radius. Drop your hook, set the swing circle, and sleep easy. If the boat drifts beyond your radius, LYFE wakes you with a clear fullscreen alarm and your exact distance from anchor.
Smart Alerts — Configure custom alarms on any NMEA value: wind speed (AWS, TWS), wind angle (AWA, TWA), wind direction (TWD), course over ground (COG), speed over ground (SOG), depth, and more. Set upper limits, lower limits, or out-of-range rules.
APPLE WATCH COMPANION
LYFE includes a native watchOS app. Glance at live sailing data on your wrist. Get tactile alarm notifications. Acknowledge or snooze without reaching for your phone. The companion app syncs alarm state with your iPhone in real time.
NMEA CONNECTION
LYFE connects to any standard NMEA 0183 source over WiFi:
- UDP (most common for marine WiFi multiplexers)
- TCP
Configure your multiplexer to send NMEA sentences to LYFE's port — that is it. Built-in setup guide walks you through it.
DESIGNED FOR REAL OFFSHORE USE
- Dark-first design — readable at night, minimal cockpit light pollution
- Background monitoring — alarms fire even when LYFE is not on screen
- Customizable snooze and dismiss behavior
- Multiple simultaneous alarms supported
- Alarm history log
- Simulation mode for testing without a real NMEA source
WHAT LYFE IS NOT
LYFE is not a chartplotter, not a routing engine, and not a replacement for your radar or AIS transponder. It is the watchful ear that listens to your existing NMEA network and wakes you when something matters.
PRIVACY
LYFE works entirely on-device. NMEA data stays on your boat. No cloud sync, no telemetry, no accounts.
ABOUT
LYFE Offshore is built by Kalle Coster, a professional sailor and engineer, after years of offshore sailing, racing and living aboard with his family. Designed from real-world experience — focused on reliable alerts, clarity and trust when it matters most.
Terms of Use:
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy:
https://www.lyfeoffshore.com/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Wind-angle alarms fixed — "inside" and "outside" range alarms for TWA and AWA now fire correctly on both port and starboard. No more false alarms (or missed ones) depending on your tack.
• Apple Watch app installs again — a version mismatch was blocking the watch app from installing; it's back.
The developer, Kalle Coster, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kalle Coster
- Size
- 7.3 MB
- Category
- Navigation
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later. - iPad
Requires iPadOS 26.2 or later. - Mac
Requires macOS 26.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.2 or later. - Apple Watch
Requires watchOS 26.4 or later.
- iPhone
- Location
- This app may use your location even when it isn’t open, which can decrease device battery life.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- LYFE Premium — Lifetime $89.99
- LYFE Premium — Yearly $49.99
- LYFE Premium — Monthly $5.99
- Copyright
- © LYFE Offshore 2026
