Good Android / iPad GPS navigation app

[RIglehart]

I am a new bareboat charterer. Don't have my own, yet. Been out on a few charters now and have used Raymarine and Garmin electronics.

I am looking for a good iPad or Android app as a backup and planning tool when chartering. I do not want to start a huge debate. I could use either Apple or Android. I just want something that works well and has good support. I notice this forum has a lot about OpenCPN. When I google for reviews I get results for iNav, iSail, iSailor, Waze, etc... OpenCPN is never in the "Top X" list.

Free is always nice as long as there are not too many compromises. Ease of use is more important than a bunch of esoteric and complex functionality. Basically, something simple that will get me home in a pinch, but isn't a "toy" app. Also, maps for entire globe, not just NOAA.

I hate learning new apps. So, whatever I get I will likely die with. I am an IT guy, so I am ok installing/learning new SW. However, buggy software, or non-intuitive software, infuriates me. Any suggestions are welcome.