Which apps are important?

Which apps would you consider important?
have 2 email addresses and want to do one for the important things and the other for the unimportant.
Apple

ID

YouTube

Twitch

Spotify

Snapchat

TikTok

Netflix

Vinted

Amazon

Paypal

XING

Good question

DB navigator

Control center

ebay

delivery hero

It depends on what you use all of those things.

And how you use it, you have to decide for yourself what is important to you

ID, Paypal, Control center: important

YouTube, Twitch, Spotify, Snapchat, TikTok, Netflix, Amazon, good question, delivery hero, ebay: not so important

I also have such a principle and go to where the pages / apps are more trustworthy and who does not send advertising.

For all websites I would trust I use my email to fully spam my second and otherwise my real one. If it looks very weird one of https://10minutemail.net/

Which email provider do you prefer for the more important apps

I'm satisfied with Web.de, so I haven't looked any further.