There is one called FairEmail. While it technically has a pro version (one time purchase), but most of the needed features are available on the free tier. Plus it's available on F Droid as well, so that's a plus and is continuously maintained.
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Uhm... Search works correctly in Fairemal here, even when it is performed on the server (not locally).
K-9 mail. 1/3rd the size as the gmail app and no ads.
I use FairEmail. I have most of emails downloaded on device and those which aren't can be searched from the server.
You can contact the dev by filling an online request form. Maybe, he can help with your search issue.
What ads are you seeing in Gmail besides your own emails that probably contain some sort of spam? 🤨
Social and Promotional sections have sponsored "emails" aka ads.
This is the official Android app you're talking about, right? I don't even see such a category/label. I'm wondering if this is one of those slow-roll outs for new BS they are planning on adding.
Apparently if you dont use inbox categories you won't see them. So that might be why you haven't. Personally I like them. The sponsored emails are easy to ignore and not seeing the spam from Linkden, that I only use when job hunting, in the main inbox is nice. Any sites I've bought from that sends sale emails gets shunted into Promotional so they dont clog my inbox either.
ProtonMail
specifically for Gmail
The best answer is to leave Gmail.
What a stupid idea. https://tuta.com/ is 3 euros a month (the price of one American egg).
It might be a stupid idea, but it's what they asked for.
It is not my duty to answer every stupid idea, I ignore that.
You don't have a duty to anything at all, including posting any comments in this thread. Just move on.
Using Gmail has been a stupid idea for the past 15 years, people need to understand that though.
I use the Gmail app. I've never seen any ads in it, where do you see them?
It doesn't have "mark as read", no, but it does have archive. Why do you want to leave items in your inbox but read?