If you want to remember recent notifications. Read those that have already disappeared from your status bar. This app remembers them for a bit longer.

The archive remembers notifications grouped by application (including system applications). You can filter / ignore applications (longer press) / ignore pictures.
You can switch to gallery grid and full-screen views.
You can search your saved notifications by entering any phrase.
Easy transfer and backup: You can export everything to a single file or import data previously saved to storage or the cloud.