Memory-Map

I use MM for sailing, in conjunction with other navigation tools. Never trust your boat & crew's safety to one method of determining your fix, but having said that, MM is a good nav program to have in your pocket.

Very detailed maps available. Love memory-map. Easy to use

I use this app quite a bit for boating & hiking, found it to be the best for noaa & USGS topo maps when out of 3G area. You can pre-download entire areas of maps fairly easily which is necessary when in the back country or on the ocean. When you use the mobile version in conjunction with their PC software it's very nice keeping track of waypoints, routes and tracks. Import/export works well. Marine NOAA maps are free to download, but you have to pay to get many other maps (USGS topo, Delorme, etc). But for ~$20 or so per map region I don't think it's that unreasonable though. I've compared many other topo apps, all of which seem to be lacking one feature or another. Memory map is worth the $$, but also lacks needed features. I end up having to use use it in conjunction with other apps, which is do-able but inconvenient. Would be much better if they could add a couple additional features, namely: 1) need ability to take photos within the app & tag them to waypoints/tracks... 2) Add 3D view (which is available in the PC version), or at minimum an option to view shaded relief via elevation data. Viewing topos in 3D/shaded relief really helps a ton, and seems it'd be fairly easy to add since they already have all the elevation data. Overall good app, just needs more features

I have used Memory-Map for marine navigation for about 10 years, first on my laptop, then on a PDA, and now on my iPhone 3GS using version 1.5.0 of this app. Yes, there are a few things I'd like to see changed, but it works better and is MUCH cheaper than any of the 3 other Nav systems I used before this. You can get USA marine charts for free from NOAA's download site. These raster scanned charts are updated as needed by NOAA. For charts of waters outside the US, you may have to buy them from commercial sources. (For my sailing in the Caribbean, I still use old raster charts I got 10 years ago. They still serve well because those islands don't move around much from year to year!) It is great to have a moving chart plotter on board (my iPhone) that I can hold in my hand! I recommend this app (ver 1.5.0) to sailors old and new.

I've used this app for many years now and it is my go to navigation aid. It is feature rich and does take some learning. Part of the learning is understanding what it is good at and what it is not so good at. It makes 180° errors too. U need a separate compass as a backup and sanity check. U can't rely on the 'navigate to' waypoint using the inbuilt compass and red/green arrow alone. You can't enter lat/long and zoom to that map point. Some of the route functions are a bit clunky. You can access tops maps for much of the planet and you can find your way. I've tried 3 or 4 others but this is the best and they keep improving it. Sometimes that's glitzy stuff that looks interesting but doesn't really impact but also things that make a difference. Highly recommended.