Platform-Specific Considerations

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Profile Photos: Control who can see your profile pictures.
Forwarded Messages: Prevent forwarded messages from linking back to your account.
Calls: Define who can call you and whether peer-to-peer calls (which may expose your IP) are allowed.
Groups & Channels: Control who can add you to groups.
Two-Step Verification (2FA): Set up an additional password for logins.
Passcode Lock: Secure the app itself on your device with a PIN or biometric authentication.
Active Sessions: View and manage all devices where your account is logged in, allowing you to remotely terminate suspicious sessions.
Account Auto-Deletion: Set a timer for your account to automatically delete itself after a period of inactivity.
Delete My Synced Contacts: Option to remove contacts previously synced with telegram data Telegram's servers.
While the core principles are shared, implementation details vary:

Android:
Requires specific Android OS permissions (Storage, Contacts, Microphone, Camera, etc.) that users must grant.
Offers granular control over cached media retention.
Local data is typically stored in app-specific internal directories.
iOS:
Operates within Apple's strict app sandbox model, limiting direct user access to app data.
Permissions are requested by the app and managed via iOS settings.
Local storage and cache management are similar to Android, but the underlying file system is less exposed.
Desktop Clients (Windows, macOS, Linux):
Store chat history and downloaded media locally, often in a user-accessible directory (e.g., Documents\Telegram Desktop on Windows).