Sometimes, the developer stops updating the Play Store version but releases bug fixes on third-party platforms. Power users grab the latest to keep the keyboard working on Android 12, 13, or 14.
This article does not condone software piracy. The is a copyrighted work. Downloading a "cracked" or "unlocked" APK without paying the developer is illegal in most jurisdictions.
If you simply want to try before buying, search for "Classic Keyboard Trial APK"—some developers offer an official 7-day trial build. Use that instead of a cracked mod.