Use APKPure App
Get Patch for Smart Launcher old version APK for Android
Install this app if you can't set Smart Launcher as default launcher.
WARNING! Install this app only if you are experiencing problem with Smart Launcher!
If you have android >4.1 you probably don't need this app.
إضغط هنا اذا لم تستطيع جعل Smart Launcher الواجهة الاساسية