WhatsApp was recently updated to bring in the end-to-end encryption security mechanism to the app. This has made the app more secure, and no one other than the sender and receiver can see the messages, images, videos, etc. in the conversation. That update was followed by a lot of minor update to fix bugs and improve the app stability.
One new update has arrived today and takes WhatsApp to version 2.16.53 (build number 451125). This new WhatsApp APK download file weighs 27.82 MB and is compatible with all tablets and smartphones running Android 2.1 or later. You can download WhatsApp APK for Android latest version from the trusted mirror sites like apkpure.com.
This is a beta release though, so do note that you might come across one or two bugs that might cause issues like crashing or sudden rebooting of your device. But that happens rarely and WhatsApp is already very stable, so you can try out the new update without any worries.
One good thing about WhatsApp is that it supports all Android devices running the very old Android 2.1 to the latest Android 6.0.1 Marshmallow. Many apps like Viber, LINE, Facebook Messenger, etc. do not support older Android versions, which is why the developers of WhatsApp are worthy of appreciation, and this is why WhatsApp is still the best.