Our family uses 1Password but many folks, including security gurus like Steve Gibson of Gibson Research & SpinRite, like Lastpass. If you do a (Google) search, you'll find a number of articles online comparing many of the most popular ones.
+1 on 1password. I love the fact that you can go use the built in browser to access your login screens. It's a little pricey but well worth it for all those sites which you have passwords for. Very clean interface and easy to use.
Another thing I meant to mention about 1password is that it can create pretty strong passwords for you which is very handy. You can select how long or how detailed the password. I use fairly long and detailed passwords for good security peace of mind and all I have to then do is copy them when I am logging in.
I'm unsure. I haven't paid anything for it on both devices. It works great. I have maybe 12 password websites saved. That could be the difference. Free allows you only X saved. I'm not positive though. Nonetheless it's always been free for me. I've used it for a few years now.
the desktop version was free when it first started then they started to charge for it. but you can still get it for free if you email 5 friends and they get it. all they have to do is install the free version once all 5 have installed it. you will be granted a lifetime account. and once you have that account it becomes lifetime for all platforms.
on a side note if you have 5 different emails you can just do all the leg work yourself