As WhatsApp continues to shrug off competition from not only Viber, but also Apple's iMessage, Microsoft's Skype and even Google's Hangouts, the instant messaging space continues to burst with activity.
However, WhatsApp - arguably the most popular cross-platform instant messaging solution - has yet to update its iPhone client with iOS 7 look and feel.
Even though we don't know when that update might drop, we have a pretty good idea of how the iOS 7-inspired application might look like thanks to iOS developer @HackiPhone who tweeted out a couple of work-in-progress screenies...