Ways to sign in
Sign in with an emailed code or link, a password, or — where turned on — Google, Apple or Discord.
On the sign-in page, "Email me a sign-in code" is the main way in — it mails a 6-digit code and a one-time link, and either one signs you in. They work once between them: after you sign in with the code, or open the link once, opening the link again says "This link was already used" with a "Sign in again" button (or, if you're already signed in on that browser, takes you straight to EverySqueeze). A link that says it has expired is more than two days old; ask for a fresh one. "Sign in with email and password" is a secondary option if you've set a password. Changing your password signs EverySqueeze out on every other device and browser, so anyone else holding your old sign-in loses it; sign in again there with your new password or an emailed code. Adding a password for the first time signs nothing out.
If you open a sign-in or phone link in a browser that is already signed in to a different EverySqueeze account, nothing changes until you choose: the page names the account the link is for and the one you're signed in to, and asks whether to switch or stay signed in. If you weren't expecting the link, stay signed in.
Where your workspace has it turned on, you can also sign in with a provider: "Continue with Apple" (inside the phone app only), "Continue with Google", or "Continue with Discord". The EverySqueeze icon added to your Home Screen does not offer them, because they finish in Safari and would sign in Safari instead of the app: use the code, your password or "Paste sign-in link" there (Staying signed in).
Adding Google or Apple to an existing account
Where this is available, Settings → Account and device shows a "Ways to sign in" list: your email (always on), your password if you've set one, and a row per provider you can add. Adding one lets you sign in with it going forward, even if that provider's own email is different from your EverySqueeze account. Google and Apple can only be added from a browser at everysqueeze.com — not from inside the phone app.
Discord has its own separate "Discord" row lower on the same screen, with its own Connect Discord button, rather than living in the "Ways to sign in" list.
Removing one
Google and Apple each have their own Remove button in the "Ways to sign in" list; EverySqueeze won't let you remove your last way in, so you're never locked out of your own account. Discord has its own Disconnect button on its row.
If an account you try to add already signs in to a different EverySqueeze account, nothing changes — you'll need to remove it there first, or contact support.