Check Your Phone Setting First
Before installing ViMusic APK make sure your phone allow unknown sources. Go to settings then click on security and enable install from unknown sources. Without this you cant install apk file proper.
Download from Safe Source
Always download ViMusic APK from a safe and trusted website. Some sites give fake or broken files. If file is not full or corupt then app will not work or will crash again and again.
Clear Old App if Installed
If you already have old ViMusic version remove it first. Sometimes old data clash with new one and show install errors. Go to app manager and uninstall the old ViMusic version fully.
Use File Manager to Install
After download go to your file manager. Find the apk file and tap on it to start install. If phone show any warning just click install anyway. Make sure you have enough space in your phone.
Final Step After Install
Once install finish open the app and check if it is running smooth. If it crash try to restart phone or install again with fresh apk file. Also keep your phone updated to avoid bugs.