none of the things you mentioned are the same Mullvad: VPN Brave: Browser K-9 mail: email client, I use it to access my gmail without using the gmail app Proton mail: the gmail app itself Aegis: authenticator (I really have no idea where you got the idea that it has anything to do with email) Brawl stars & Roblox: Games, but they are COMPLETELY different games Tiktok: Entertainment (even though I don't use it for that)