# Time On Water — Marine Instruments & NMEA

> Marine Instruments & NMEA (iPhone/iPad app by Luke Matthews.)

- Source: https://appshunter.io/ios/app/time-on-water/id6805085286 (this page in markdown: same URL + `.md`)
- Developer: [Luke Matthews](https://appshunter.io/developer/6790061446)
- Category: Sports
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 8 MB
- Languages: American English
- Released: 2026-09-09
- Data updated: 2026-09-28
- User reviews in markdown: https://appshunter.io/ios/app/time-on-water/id6805085286/reviews.md

## What is Time On Water?

Time On Water turns your iPhone or iPad into a marine instrument display built around the way you use your boat.

YOUR BOAT. YOUR DATA. YOUR DISPLAY.

Create your own dashboard pages, choose the information that matters and arrange it into clear, readable widgets. Start with your iPhone’s built-in location data, or connect compatible onboard instruments for live information from the boat.

BUILD DISPLAYS FOR THE JOB

Every boat—and every person aboard—is different.

Create focused pages for the helm, the rail, the start or general sailing. Choose your widgets, change their size and organise your dashboards around what you need to see at a glance.

Depending on your device, subscription and connected equipment, available information can include:

• Speed over ground and course over ground
• Position and heading
• Apparent and true wind
• Boat speed and depth
• Navigation and waypoint information
• Sailing-performance data
• Polar targets and percentage of target

CONNECT THE BOAT

Time On Water can connect to supported marine-network gateways over Wi-Fi, bringing compatible onboard data onto the screens you already own.

Save the connections you use and return to them quickly with Quick Connect. Data availability depends on the instruments, gateway and information present on the boat’s network.

RECORD YOUR TIME ON THE WATER

Start a Session and preserve what happened on the water.

Free users can record position, speed over ground and course over ground using the iPhone’s location services. Connected boats can record the marine data available through their supported gateway.

Review your Sessions, inspect the recorded track and replay the sail through the same configurable dashboards used for live data.

Change pages, try different layouts and revisit the Session as though the recorded information were arriving from the boat again.

FOR PERFORMANCE

Time On Water Pro adds boat-specific performance tools for sailors who want more than raw numbers.

Import and select polar data, compare live performance with target speed and display focused information for different points of sail.

FOR THE START

Turn live position, movement and wind data into information you can use during the starting sequence.

Set the ends of the starting line and monitor:

• Real-time line bias calculated using your wind data
• Distance to Line
• Time to Line
• Time to Burn

Time On Water continuously updates the numbers as the boat moves, helping you judge whether you are early, late or approaching the line on time.

START FREE

Explore Time On Water using the sensors already in your iPhone:

• Build configurable dashboard pages
• Display device position and movement
• Record and replay GPS-based Sessions
• Explore the supplied demonstration Session

CONNECTED

Connect supported onboard instruments:

• Receive compatible live marine data
• Save connection profiles
• Use Quick Connect
• Record and replay connected Sessions

PRO

Add sailing-performance intelligence:

• Polar import and selection
• Live targets and performance calculations
• Real-time start-line tools
• Line bias, Distance to Line, Time to Line and Time to Burn
• Everything included with Connected

Connected instruments and advanced performance features require an eligible subscription and compatible marine-network equipment.

Continued use of location services during an actively recording Session can affect battery life. Background location is used only while a Session you explicitly started remains active.

Time On Water is a supplementary display. It does not replace primary navigation equipment, alarms, safety equipment, charts, proper seamanship or the need to maintain an appropriate lookout.

Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy Policy:
https://www.timeonwater.com.au/privacy

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro | Free | one-time |



## Version history (last 5 releases)

### 1.0.4 — 2026-09-26

- Added a bundled catalogue of 21 reference polars.
  - Search by boat class.
  - Add a reference as an independent editable polar.
  - Automatically make the added polar active.
- Improved the Apple Watch starting-rule interface.
  - Shows the current preparatory flag prominently.
  - Opens a dedicated selector for P, I, Z, U, and Black flags.
- Fixed standalone DTL, TTL, and TTB dashboard tiles.
  - They now use the live start-line calculation rather than looking for nonexistent raw instrument fields.
  - They refresh during the countdown.
- Fixed start-line widget rendering.
  - PIN and BOAT dots are aligned directly on the line.
  - Labels and favoured-end text no longer shift the endpoints.
  - Removed the meaningless centre dash when timing status is unavailable.
- Enabled iOS file sharing, making app documents accessible through Finder/iTunes file sharing.

### 1.0.3 — 2026-09-18

Apple Watch! The Apple Watch companion app allows you to see customised dashboards straight from your wrist! It's got a set of Ninja starting screens for our friends on the bow.
- Choose what flag you're starting under: I, Z, U, Black
- The smart start screen gives you visual guidance to how the boat is going coming into the start line.
    - Red — EARLY
    - Dark green — LATE: get moving.
    - Light green — ON TIME: maintain your approach.
    - Purple — OVER

The iPhone has an improved depth graph. The graph now starts from 0m. It has line smoothing so that the bottom does not look like a scribble. It also has shading to differentiate between the bottom and water.

### 1.0.2 — 2026-09-14

Go Sailing!
On the home screen, when you want to start a session, you can click Go Sailing. It will start a session and take you straight to the dashboards

### 1.0.1 — 2026-09-12

Grouping of data widgets is grouped together by data type now to make it easier to find the fields you are interested in

### 1.0 — 2026-09-10

No release notes.

## Apps similar to Time On Water

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [SailPro for Yacht Racing](https://appshunter.io/ios/app/sailpro-for-yacht-racing/id6505048217) | 3.0 (2) | Free | Sports |
| [Australian Open Tennis 2026](https://appshunter.io/ios/app/australian-open-tennis-2026/id345137837) | 4.8 (15,098) | Free | Sports |
| [Play AFL](https://appshunter.io/ios/app/play-afl/id6449444200) | 4.2 (12) | Free | Sports |

## More apps by Luke Matthews

- [SYC Courses](https://appshunter.io/ios/app/syc-courses/id6790061444)

All apps by Luke Matthews: https://appshunter.io/developer/6790061446

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-28.*