This application seems to be unnecessary with SailfishOS 2, as SSFOS2 has everything in place and working with regard to notifications from Android apps. It may even disturb SFOS2's built-in notification mechanism for Android apps.
For some Android apps (as of SailfishOS 2.0: e.g. K9-Mail, Conversations, Threema, TextSecure) a notifier entry is missing, which can be easily added, see https://together.jolla.com/question/...plication-list