Because XAPK files are not standard Android installers, they cannot be opened by the default package manager. You can use these methods to install version 3.7.5:
The most likely refers to the latest version of the Haylou Fun health and fitness app , which recently updated to version 3.7.5 . Application Overview App Name: Haylou Fun Current Version: 3.7.5 Download APK File [XAPK] v3.7.5
Ensure "Install from Unknown Sources" is enabled in your browser or file manager settings. Because XAPK files are not standard Android installers,
Copy the .obb file (located in the Android/obb folder) to your phone's internal storage path: /Android/obb/ . Install the base .apk file normally. Copy the
You generally need at least twice the file size (approx. 200MB+) available to extract and install an XAPK.
XAPK (A package format that includes the base APK plus OBB data files) License: Free Requirement: Typically Android 5.0 or higher Installation Guide for XAPK