Android 4.4.4 (KitKat) is an older OS version. Installing the Google Play Store APK on such devices can restore access to apps, but it requires care: matching versions, compatible Google Play Services, and attention to security.
Because modern Play Store versions require Android 6.0 or higher, you must download a specific legacy version designed for API 19 (KitKat). play store download apk android 4.4.4
Follow these steps to install the Play Store on your device: Play Store APK for Android 4
Play Store Keeps Crashing: You might also need to update Google Play Services. The Play Store relies on "Services" to run; if they are out of sync, the store will crash. Download the corresponding Google Play Services APK for Android 4.4.4. Download the APK onto the device’s internal storage
.apk file.com.android.vending_x.x.x.apk file.Warning: Never use “Play Store APK” blogs that require you to install a custom “installer” app. Those are almost always malware.