Version 1.3 of this app can apparently do full isochrone routing, and the text in the App Store says that 1.3 is the current version. However, when I paid and downloaded the app I got version 1.1, which ones NOT do routing, and the App Store says I have the latest version. So it appears that the version actually in the store does not match the text description.

I don't normally write reviews, and as an IT Consultant and avid sailor, I had to comment. This app is great once you get the handle on how to use it. First the App is excellent in getting a view of sailing conditions in my South Florida region. Not only do I get wind, etc but I also get current data which is important for any Gulf Stream crossing. I use OpenCPN on Linux, and can easily transfer the routes between the iPad and Weather4d, that's handy when I am preparing at home or on the boat. I also use qtVlm on Linux (weather routing) and but have not compared the calculated optimum routes as yet. I would like to know if the app takes into account current as well as wind and boat Polars, but I can work that out myself.The main benefit to me is to be able to visualize the boat in a crossing over the calculated route time using the time function to pinpoint any adverse conditions in a visual way, from this perspective this app really excels. The animation is first class.I save the GRIB files from Weather4d, import them into qtVlm or other applications on my Linux laptop, and viola I have all the wind, wave and current data I need.Lastly, support from Olivier is excellent. I had a problem on saving my GRIB files in the last release, and to my surprise I got an email back within 24 hours telling me he had fixed it, and guess what, he did. Awesome!For weather routing, I can't comment at this stage, but just for the our visualization of the route it's worth the cost. Everything else is a bonus.

Don't know what happened to my lengthy first review. Seems to have just disappeared. So here is the short version. This app ROCKS! The weather predictions have been spot on and the weather routing is impressive. Speaking of impressive, the authors availability! I had a concern about routing and emailed him. He replied almost immediately (considering he is in Europe and I am in the States) and advised why it wasn't working and that he would have it fixed in the next release. The issue was that I was trying to route and there was some land in the way. Even though I went around it, the program could have used it and therefore failed. He has it excluded now and all works wonderfully. Again, TOP NOTCH. Yes, the price is more than your usual app, but this is a PRO app. It is substantially less than my last weather routing program by a few thousand. Yes, THOUSAND.

I was quite skeptical at first. I watched this app for quite some time and after a couple of updates, I finally decided to take the plunge. I was really thinking it was way overpriced, but after using the app for a few days now, as the title says, I'm quite impressed. It is well designed and after only a few minutes, very user friendly. My only regret, was waiting too long to make the plunge.The only concern, it must be memory hungry. It will crash upon start until it takes back the memory and then runs like a champ.