Alternatives to WhatsApp? Well, some will recommend you to download Telegram, LINE, Facebook Messenger... but you just might want to stick to an alternative version like this PLUS Holo.
The version with a Holo interface
You've surely heard about the Plus version of the chat instant messaging app that expanded its features and allowed us to change its colors, apply different themes, get rid of size limitations when sending files... well, by downloading the APK of WhatsApp PLUS Holo you'll be able to get hold of a version with similar functions but with a Holo interface.
Give the interface of your favorite instant messaging app a new aspect.
It's simply a visual change that has been added to the above-mentioned Plus version as well as the Reborn edition. You won't experience any dramatic change regarding the original messaging app, but if you like breaking the monotonous aspect of your smartphone it can come in handy (one of the advantages of using Android instead of iPhone, as you know)... but go for an anti-banning option: WhatsApp doesn't like the fact that you use alternative versions.
And as you want to know where you can download the app from, you should be aware that you won't find it on Google Play. You might be able to get hold of it on Aptoide, but since you're already here, the best thing you can do is download the file straight to your smartphone from Malavida.