Maitai, who is very active on CF, is an expert on Mbtiles as they are viewable in his great routing app (bordering on an chartplotter) QtVlm
(Pic #1, 2)
I THINK this is true also of Paul Phiggins of GE2KAP fame on this forum
Sailgrib, a well respected routing Android app, can also display Mbtiles
Sasplanet, hence mbtiles, has recently become quite fashionable as you could download Navionic tiles for free. AFAIK, some people are diretly using Sasplanet as a navigation
app, with the charts
More to the point, using GE2KAP, you can/could create kap chartlets from Sasplanet Navionic display quite hassle free, and view them on O (Pic #3)
has recenly cracked down on this illegal use of their charts
, although a workaround has been found by the Sasplanet team. But for how long ?
Now all the very many charts available on SasPlanet (including Bing (Microsoft) great aerial / sat pics, often clearer / more recent that those on Google
Earth) can be downloaded in Mbfiles format
You may want to play with Saspanet: it's worth a try.
(I don't know wether the Navionics
charts are available in this build as the workaround has received limited publicity for obvious reasons)
BTW did you notice my post