question: Please create a detailed feature list for a new iOS application that emphasizes security and user-friendliness. Ensure that the list includes at least 5 placeholders for customizable security features, such as [USER AUTHENTICATION METHOD], and use all capital letters for these placeholders.
answer: **Feature List for Secure & User-Friendly iOS Application**
  
  1. **[USER AUTHENTICATION METHOD]:** Choose from a variety of authentication methods such as biometrics (Face ID, Touch ID), traditional password, or PIN-based options to ensure user security and convenience.
  
  2. **End-to-End Encryption:** All user data is encrypted both in transit and at rest, ensuring that sensitive information remains confidential and protected from unauthorized access.
  
  3. **[DATA BACKUP STRATEGY]:** Users can select their preferred data backup method, whether it's cloud-based, local device backup, or no backup, giving them control over their data redundancy and recovery.
  
  4. **Simple Account Recovery:** A user-friendly recovery process with multiple options like security questions, email verification, or phone number verification to regain access to accounts securely.
  
  5. **[TWO-FACTOR AUTHENTICATION SETTING]:** Users can enhance their account security by choosing additional verification methods, such as SMS, authenticator apps, or email, for two-factor authentication.
  
  6. **Minimalist Design:** A clean and intuitive user interface that simplifies navigation and reduces complexity, making it easy for users of all technical levels to use the app effectively.
  
  7. **[PERMISSION MANAGEMENT CONTROL]:** Users can customize which app features and data are accessible, ensuring privacy by selectively granting permissions for location, contacts, microphone, and camera access.
  
  8. **Security Alerts:** Immediate notifications for any suspicious activities or login attempts, allowing users to respond quickly to potential security threats.
  
  9. **[SECURE DATA SHARING OPTION]:** Options for securely sharing data with others, such as through encrypted links, QR codes, or secure collaboration spaces, ensuring that any shared information remains protected.
  
  10. **User Education & Support:** Built-in guides and tutorials to educate users on security best practices, along with a responsive customer support system for resolving issues.
  
  11. **[CUSTOMIZABLE LOCKOUT POLICY]:** Users can define the lockout parameters after failed login attempts, such as locking the account or requiring additional verification, to prevent unauthorized access.
  
  12. **Automatic Updates:** Seamless and regular updates to ensure that the app remains secure and up-to-date with the latest security patches and features.
  
  13. **[DATA RETENTION POLICY ADJUSTMENT]:** Users can specify how long their data should be retained, choosing from options like automatic deletion after a set period or manual deletion, to manage their digital footprint.
  
  14. **Dark Mode & Accessibility Features:** Options to switch to dark mode and customize accessibility settings, ensuring the app is comfortable and usable for everyone. 
  
  This feature list ensures that the application is secure while maintaining a high level of user-friendliness, with customizable options empowering users to tailor their security settings to their needs.