This page is a bit new but will introduce the mobile apps that work with WP/LR Sync. The WP/LR Sync API allows external applications to use it (with authentification through a QR Code). You need to enable the JSON API for WP/LR Sync in the Settings of the plugin in WordPress.
WP/LR Sync Portfolio (IOS)
You can look for it in your iTunes Store under “WP/LR”.