Two things.
First for basic net security a VPN. I use these guys https://www.privateinternetaccess.com/ and they work pretty well. They do slow my traffic down some but if i am in need of a fast file transfer I just turn it off. I have no trouble streaming with it on though so it still leaves my connection fast enough for the majority of uses with no noticeable issues.
There are many to chose from another popular one is https://www.ipvanish.com/pricing.php I have not tried them myself so can not vouch for their speed but most of what i have read about them seems good.
Both of those will work on most platforms.
Second for the passwords. I highly recommend last pass. https://lastpass.com/
That is a password manager, you make one strong password and then let last pass generate ridiculous passwords for everything else. For example I just had last pass generate this password 1Cnd!0$bLOrjgvGY4z That would take decades to crack. Basically it is an extension for your browser or an app for your phone it encrypts all of your stored passwords on your end so they can not be compromised. So what I do is when I run my chrome with last pass installed I enter my one last pass password that is also a good strong password. After that it has all of my other passwords saved so when I visit say my bank it will fill out my login info for me. I don't know any of my passwords really except the last pass password and my gmail. All of the rest of my passwords were generated and saved by last pass.
If you are using chrome and signing in to it last pass will follow you to every device when you log into chrome no need to reinstall it it does so automatically when you sign in to chrome. So if i go to say a relatives house and need to get to my bank on their computer I sign into chrome then last pass and go to my bank and it fills in my login just like I was at home. Again it encrypts all the passwords so there is no danger of them being compromised.
Great program and will even check all of your saved passwords and find duplicates and help you change them. Well worth the few dollars a month for the premium but even the free version is good if you just want to run it on one machine.
Anyway I wouldn't buy a device where you are stuck if the device breaks. With the two solutions I mentioned here you accomplish the same thing and are not locked to a single piece of hardware and all the problems that come with it .. battery, lugging it around. basic hardware failure.. etc