TZ iBoat – Marine Navigation 4+

Marine charts, GPS and Weather

Nobeltec, Inc.

    • 4.6 • 254 Ratings
    • Free
    • Offers In-App Purchases



Navigate with detailed marine charts and full weather forecasts with or without internet. Routes, marks and catches in one tap. Award-winning app, essential at sea

DISCOVER THE ONLY APP YOU NEED AT SEA! TZ iBoat is the most advanced boat navigation app on the market, it gathers all the features necessary to safe navigation:

- Official Raster and Vector nautical charts (worldwide coverage)

- Unlimited GFS weather forecasts + 5 premium models

- 3D view and satellite images, providing the most realistic experience

- Routes, marks and catches in just 1 tap

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

- All your data is accessible online and offline

- Optional Radar and AIS modules

At sea, having access to the most accurate weather forecasts is crucial! This is why new weather features are the focal point of the latest version of TZ iBoat:

- Advanced weather display: in color, with animated particles, arrows or with labels to visualize wind, wave, current, pressure, cloud and precipitation.

- Meteogram: detailed presentation of weather forecasts along the route. Display one or more weather variables in graph depending on the location and the date.

- Offline weather: download weather forecasts to be able to use them offline while at sea.

- Iridium GO! Compatibility

- Free and unlimited GFS and WW3 weather forecasts

- New Premium Weather subscription gain access to 5 high resolution models: Arpège, Arome, DWD ICON, NAM Conus and Copernicus with worldwide coverage.

NOTICE FOR FISHERMEN! A new “Event and Catch” feature has been developed for you!

Save all your catches (weight, size and photo) and grow your fishing log that is directly integrated to your nautical chart. Master your fishing areas like never before!

The unmatched usability of its interface is what makes TZ iBoat absolutely essential! Its extremely intuitive features and its powerful 3D chart engine allow you to browse, rotate and zoom into your marine charts with incredible smoothness. Ease and comfort of use guaranteed in an app that will become vital to your navigations!

Join the large community of sailors that trust TZ iBoat for their trips at sea. More than 100,000 users around the world have already adopted it!


The payment will be debited form 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 2.3.7

Minor version:
- New Wind « Beaufort » Unit.
- Issue with options sliders fixed.
- Various other bug fixes.

Ratings and Reviews

4.6 out of 5
254 Ratings

254 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.

Chesapeake Bay Cruiser ,

Great App loaded with features

I have been using the TZ iBoat app for a few months now and can’t say enough good things about it. It’s simple, easy to use UI along with its extensive feature set make this one of the few navigation apps truly worth having. It’s seamless integration with my Furuno TZT2 system just makes an already great app even better. I love being able to build routes for upcoming trips at home and have those routes show up on my TZT2 network. I just upgraded to version 2.0 this morning and am already loving the addition of weather features. Keep up the great work.

Developer Response ,

Thanks a lot for you great feedback! Feel free to contact me at for any further information.

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.

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