: Older versions (like v13) may not work on modern iOS versions, leading to crashes or "app must be updated" errors.

: Official developers like Enfour, Inc. only provide technical support and feature updates for legitimate purchases. LDOCE (InApp) - App Store

Instead of using unverified files, you should use the official, secure versions of the Longman Dictionary available on major app stores.

: Files labeled "hidden" or hosted on third-party file-sharing sites often contain malware or trackers that can compromise your device.