# Login — Mobile app

Everything a returning user needs to authenticate quickly and securely.

Source: https://www.checklist.design/mobile/login

## Items

### Social sign-in
Sign-in options that connect to an existing Apple or Google account, bypassing manual credential entry.

_Tip: On iOS, Apple Sign In is required by App Store guidelines if any other social provider is offered._

### Email field
The input where users enter the email address associated with their account.

### Password field
A masked text input for the account password, with the option to reveal what has been typed.

### Biometric authentication
Face ID or fingerprint sign-in for returning users who have already authenticated once with a password

_Tip: Encouraged to suggest after initial login so it’s a faster experience in the future_

### Credential autofill
System-level support for pre-filling saved email and password from the user's password manager.

_Tip: textContentType on iOS and autoComplete on Android are the attributes that trigger native autofill._

### Forgot password link
The link users reach for when they can't recall their password, leading into the reset flow.

### Error states
Feedback shown when authentication fails, distinguishing between an unrecognised email address and an incorrect password.

_Tip: Generic 'incorrect credentials' gives users no useful signal — knowing whether the email or password is wrong helps them recover without guessing._

### Passwordless sign-in (magic link)
An alternative sign-in method that sends a one-time link to the user's email, requiring no password

_Tip: Useful for infrequent-use apps where remembering a password between sessions is difficult_

## License for the Checklist Design collection

Checklist Design collection: https://github.com/Checklist-Design/skills
Snapshot: bfae71e507b1b7c03c12e0756402b60eb80f5d14 · Imported: 2026-11-12
Republished under the MIT License. Original checklist text belongs to Checklist Design.

MIT License

Copyright (c) 2026 Checklist Design

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