: Build 4970 is a legacy version. Newer builds, such as version 9.3.75, typically require Android 7.0 or newer .

: Build 4970 is the internal version code for Librera Reader 8.8.4 .

: Downloading APKs directly bypasses update notifications and security checks provided by standard stores. It is highly recommended to use the F-Droid client whenever possible to ensure you receive verified, signed updates.

: Repositories like Uptodown and Aptoide maintain extensive version histories for Librera. Technical Details & Safety

: While the official Librera site primarily hosts newer versions (currently up to 9.3.75), older builds are often archived on GitHub under their "Releases" section.