Yes, Active Captain is both an I phone, I pad, android, Garmin Blue chart, computer (and a few I missed ) application. There are loads of features--many of which are in the future, and just being implemented now. E-boat cards, allow you to track where your friends are, if you wish. I believe that some chart plotters are not starting to incorporate the information. I use it on the i phone and i pad, mostly. But do some beta for some of the other applications.
Jeff and Karen (plus some other volunteers check every piece of information input. Thus they filter out any thing which does not make sense. It is also "self policing' In that if I see an error in a anchorage, I can comment on it--and then the "moderators" check it out.
This is allows boating information to be as up to date as possible. Probably the greatest use is on the Loop. But there is a large amount of information on Alaska--much of it from long time cruisers in that area. I have put in some information on Lake Powell, and a few of the other areas we use a c Brats.
Jeff and Karen Siegel live on board their Defever trawler, did the loop recently, and work full time plus on this project. They are brilliant software designers, as well as great salesmen, and very proficient boaters.