https://support.google.com/mail/answer/7190?hl=en
I'll try ninemail. Thanks.
Everyone has this. It's called IMAP.
As for the gmail web client, various services are providing similar interfaces on their email service.
(A great thing about HN is that you don't need to have an account in order to read articles. So I can bookmark it on my phone without worry.)
Browser is a huge, unreviewable (well not true but there is not just simple to reverse java code but also arm dissasembly to be done and that part can take forever), black box that you have to trust and as you dont use it for one single task (as for instance mail client - there is exactly one ip address where it needs to connect to in my case - to my mail server - and my mail client is allowed to connect exactly there and nowhere else) you cant "jail" (pun, not as bsd jail) it. And I dont use any google spyware on my android phone, like GMS.
This might be of help to you, I have reviewed the code and if you pay a donation directly, it wont do anything fishy (and I am building my own version and diffing every version with my baseline - for 2.266 I can guarantee it is safe): https://github.com/M66B/NetGuard