I use Readly from NZ. Mainly for Yachting Monthly, which is far the best yachting mag imo, although aimed at the “average” uk sailor with a 30-50’ boat
cruising the Solent and rest of uk. It has good articles about seamanship. I also read Practical Boat
Owner which is ok, but has a fair bit of fluff masquerading as jokes, and is aimed at the bottom-end budget
sailor. Some handy diy
tips occasionally. Sailing today has some stuff but generally lower quality, lots of articles about chartering around the world. Yachts and yachting is racing-oriented but interesting in parts
if you already have readly. Cruising World gives an insight into the US sailing scene and is fairly old-school but has interesting reports from cruisers around the world.
YM is the only mag I used to subscribe to, but if you have readly you may as well get the lot. On an iPad
Pro it’s like reading the magazines, and you get several years of back issues too of course, readable offline once you’ve downloaded them.