Whatsapp says technology has changed dramatically since its birth, something which led to its decision to drop support for ageing mobile platforms.
Whatsapp could end support for a number of old smartphones by the end of this year, the DailyExpress reports.
At the end of this year, WhatsApp will no longer work on the iPhone 3GS, Windows Phone 7 devices, and phones running Android 2.1 or Android 2.2, according to the DailyExpress.
The company first spoke about the change back in February of this year, when it celebrated its 7th birthday.
Whatsapp is the most popular chat app and boasts more than one billion active users worldwide.
Whatsapp says technology has changed dramatically since its birth, something which led to its decision to drop support for ageing mobile platforms, the Daily Express reports.
In an official statement on the company blog, WhatsApp writes: "As we look ahead to our next seven years, we want to focus our efforts on the mobile platforms the vast majority of people use.”
"So, by the end of 2016, we will be ending support for WhatsApp Messenger on some mobile platforms.
"While these mobile devices have been an important part of our story, they don't offer the kind of capabilities we need to expand our app's features in the future.
"This was a tough decision for us to make, but the right one in order to give people better ways to keep in touch with friends, family, and loved ones using WhatsApp.
"If you use one of these affected mobile devices, we recommend upgrading to a newer Android, iPhone, or Windows Phone before the end of 2016 to continue using WhatsApp."
Here is a list of devices that will no longer support WhatsApp by 2017: