qtVlm is a navigation software for Sailing Boats. The application has a free version with basic features and a full version available through in-app purchase.

The free version of qtVlm is a full grib viewer displaying all types of gribs and providing many advanced grib functions. It supports basics charts and some simple instruments. It includes also an Anchor Alarm module, a viewer for shapefiles, for instance those coming from SHOM, and can be configured to receive boat position either from internal GPS or from an external NMEA source connected through tcp, udp or gpsd.

The full version adds many functions and features:

- Weather routing and route modules,
- A complete set of navigation Instruments,
- Charts modules for Raster charts, Vector charts (S57 and S63) and mbtiles,
- Iridium GO! communication
- AIS,
- Start line mode,
- Access to Great Circle gribs,

qtVlm can also be used in Simulation Mode, which allows you to simulate a navigation through our server. This is the best way to learn using qtVlm.

Once activated the full version will be available on all your iOS devices.

What’s New

Version 5.8.11

Routing Module Improvements in precision especially when penalties for tacks/gybes are activated.
Charts Module: Improvement in rendering speed for Rasters and Vectors charts
POIs Module: You can now attach an image to a POI.

Ratings and Reviews

4.7 out of 5
3 Ratings

3 Ratings


Meltemus SAS
134.3 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.

Age Rating
Rated 4+
© 2015 Meltemus SAS
In-App Purchases
  1. Full version $35.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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