Over time, user interfaces can become cluttered. Modern versions of CapCut heavily promote the "Pro" subscription, locking certain filters and effects behind a paywall. In version 3.1.0, the interface is streamlined and focused on the core editing experience. While some premium features existed then, the pressure to upgrade is often less intrusive, allowing you to focus purely on the cut.
An APK (Android Package Kit) is the file format Android uses to distribute and install apps. Normally, you download apps directly from the Google Play Store. However, when you search for you are looking for a manual installation file because: Download CapCut 3.1.0 APK for Android