The availability of a 4-deck layout often depends on the specific version and platform: 4-Deck Availability

If you want the legitimate 4-deck experience without hunting for APK files:

There is no official "Cross DJ 4 Decks" APK from Mixvibes (the developer). The latest official version is Cross DJ Pro , which supports up to 2 decks on mobile. Any APK claiming "4 decks" is likely a modified, unofficial, or fake file that could harm your device.