Worried about friends complain "You ignored my messages!!".
OFFLINE designed to help users to catch the LINE and Messenger messages and read it.
Your friends would never know you have read it.

* Support for all kinds of messages: private chat messages group chat messages and stickers.

* please open the notification setting
references:

LINE Settings
【Settings】→【Notifications】→ enable【Notifications】and【Show Preview】
https://goo.gl/aZBnp2

Messenger Settings
https://goo.gl/8mo1mC

Android Settings
【Settings】→【Security】→【Notification access】→【OFFLINE】
https://goo.gl/AKrEx3

Permissions note:
【ACCESS_NETWORK_STATE】only for advertisement.
【WRITE_EXTERNAL_STORAGE】only for images cache.