TZ iBoat – Marine Navigation 4+

Boat GPS, Charts, AIS, Tides

Nobeltec, Inc.

    • 4.6 • 512 Ratings
    • Free
    • Offers In-App Purchases



Navigate with the most complete marine charts for coastal boating, sailing, and fishing with or without internet. GPS, anchoring, AIS... Your next-generation chartplotter

Navigate the seas with the most complete marine charts for coastal boating, sailing, and fishing with or without internet. GPS, anchoring, radar, AIS, tides & tidal currents... This next-generation chartplotter is essential for sailors, boaters and fishermen of all levels!

TZ iBoat is the most advanced boat navigation app on the market, it gathers all the features necessary for safe maritime navigation:

Experience the revolutionary TZ MAPS: a cutting-edge marine chart format that integrates Raster and Vector data, detailed land information, high-resolution satellite photos, and high-resolution Bathymetry. Unlock the full potential of TZ MAPS with a 7-day free trial.

- COMMUNITY MAPS: contribute to the marine chart data in your navigation area by commenting, note-taking, voting, and modifying or deleting objects such as buoys, obstructions, and points of interest (restaurants and supply stores) in a participative way that benefits the whole TIMEZERO community, developing the most reliable and precise boat map.

- DYNAMIC MOORINGS: discover classified nearby anchorages based on weather forecasts and topography. Dynamic color coding (Red, Orange, Green) provides wind direction for optimized anchorage comfort.

- DYNAMIC LIGHTS: visualize light sectors according to your boat’s position and field of vision. Navigation lights on the map can flash in accordance with your position. Highlighted and flashing lights represent only those within your actual field of vision.

- SMART SEARCH: access a high-performance search engine to find any information on our marine charts (tide stations, rocks, buoys, etc.) as well as in your user object database (marks, routes. etc.). No more wasted time searching your map for a marina; enter the name and it will be automatically located on the map.

- SMART ZONE: Set up an alarm for when your boat enters or leaves specific areas on the nautical chart (e.g., restricted areas). Configure the types of affected to suit your preferences. Display NavData to see a list of all zones in which your boat is located.

ATTENTION FISHERMEN! The following features have been developed especially for you:

- BATHYVISION: Discover the best bottom data available and display it dynamically and intuitively in color and/or with contour lines. Adjust the contour lines’ density and shading to focus precisely on high-potential fishing areas.

- EVENT AND CATCH: Save all your catches (weight, size, and photo) and build your fishing, seamlessly integrated with your nautical chart. Master your fishing areas like never before!

- Track and analyze every aspect of your sea trips, share them, and connect with friends

- Access your data online and offline

- Optional Radar and AIS modules

Having access to the most accurate marine weather forecasts is crucial at sea, and TZ iBoat has you covered!

- Free and unlimited GFS and WW3 marine weather forecasts

- Download weather forecasts to use offline while at sea.

- Iridium GO! Compatibility

- Premium Weather subscription grants access to 5 high-resolution models: ARPEGE, AROME, DWD ICON, NAM Conus, and Copernicus with worldwide coverage.

Join the large community of sailors that trust TZ iBoat for their trips at sea. More than 200,000 users around the world have already adopted it!


The payment will be debited from the Apple account once the purchase is confirmed.
The subscriptions and automatic renewals can be managed by entering the account settings after making the purchase.
Any unused part of a free trial period, if offered, will be lost when a subscription is purchased.

Terms of use:

Privacy policy:

What’s New

Version 3.0.9

We have worked hard with the Furuno teams in Japan to bring you compatibility with the brand new FCV 600 and FCV 800 fish finders! The connection between TZ iBoat and these fish finders is easily made via WiFi. You can now easily switch between the map and the fish finder view directly in your TZ iBoat app!

• Meteogram improvement: in previous versions, when using the meteogram, it was cumbersome to switch from one model to another. In this version, we have integrated buttons into the meteogram to allow direct model switching. You will therefore be able to compare these models very easily!

• Quick access to NMEA configuration: many of you have requested this shortcut, and we have made it! You have direct access to the NMEA configuration by simply tapping the Warning bar (orange) when the message "Connection lost with NMEA gateway" appears.

Bugs fixed:
• Export of routes that contain special characters in the name.
• Fix of a bug related to the Tooltip not opening on certain objects.
• Correction of a crash in Search.

Ratings and Reviews

4.6 out of 5
512 Ratings

512 Ratings

Piggings ,

Best navigation app

I’ve been using the computer version of TimeZero and older versions of Nobeltec for a very long time, and this has almost all the features of the computer version. It seems like they replaced the track line recording feature with the ability to share with your followers, which is kind of annoying, but not too big of a issue. For $20 a year it is not the professional navigation program that the $3000 one for PC is, but it is much better than the other app I had. They also seem to make improvements based on feedback, so I hope they bring back the old way of recording track lines. One other thing, and this is not that much of an issue for average use and is probably less of a problem with the app than the actual GPS in my phone, is that if you’re going slow, as you do while setting a longline, it sometimes doesn’t show the boat icon facing the right way. Again, not too much of a problem for average use, but one of the times it happened I was setting a longline and I thought the boat was pointing towards a 25 fathom sounding on the chart, but the icon was pointing the wrong way and it ended up being 49 fathoms. The other small things that could be improved is it would be nice if you could see the SOG without having the whole sidebar open. Overall, while it has a few small issues, it is great for navigating skiffs and much better than the competition.

Developer Response ,

Hi Piggings, thank you for your report.
Yes it's true that we encourage users to send feedbacks, and we take them in account to improve the product. Sometimes it takes time, but that's what we do.
About track line: We noticed that lots of customers were using tracks to record their whole trip, but as they were struggling to manage 30K points limits, we decided to this dedicated feature called "trips"; But indeed we have to put back a kind of track feature for fishermen like you. We are working on it. For the moment, continue to record trips, because all your navigation data is in there.
About your posiitoning problem, I don't think it's a TZ iBoat issue. I would like to see your track, I might be able to see if it's a GPS accuracy problem. Send me an email please (
To show permanently SOG, again, just start a Trip (big NAV button in bottom right of the screen); Then the trip bar shows Trip time, distance, but also SOG. These 3 slots are configurable.
Mathieu, TZ iBoat product manager

Sailor 1 ,

Ease of use

TZ iBoat is one of the easiest and most complete aids to navigation on the market. The seamless charting works flawlessly, the detailed tides and currents right on the chart make it easy for anyone looking on. There is no time needed for flipping between programs which enables you to keep your eyes out on the water and not always buried in the screen. The distance and bearing feature is so easy ito use that identifying navigation aids and points of land with a hand bearing compass is fast and accurate. iBoat is clearly a fantastic navigation aid that when used with other aids such as hand bearing compasses, depth sounders, binoculars, etc, will help to make your trip as safe as possible. This aid to navigation does so much more including being able to add and remove features from your screen easily in order to keep your screen uncluttered works extremely well. I would rate this Nobeltec product higher than anything else seen on the market today. Look it up and I challenge you to find a more complete easy to use program.
Captain Thomson.

Developer Response ,

Hi Captain! Thank you very much for your report! V2.0 is going to be released (early july 2020), it is even easier to use! Please send us your feedback when it's released and you have played with it.

zimbz ,

Very happy

I’ve just recently downloaded this app. I have been using another app based navigation system solely for the the last ten years of cruising all over Central American and South Pacific. The app I was using failed, that’s when I realised I had no easy backups. After making land fall I spend many hours over many days looking at, reading about and downloading all the marine offline navigation apps w/ AIS overlays. I settled with TZ and after an adjustment period of getting acquainted with the new system. I can say I’ll keep to other app for a back up, BUT TZ is sooo much better and fun to use!!!! It has everything I need and more.
Thanks for such a great product!!!!

App Privacy

The developer, Nobeltec, Inc., 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 Linked to You

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