Either its iOS device or an android phone, it is possible to hack app with phone number. Or, you can also take necessary measures to stop hacking after you find out about the act. There are ways you can protect your account from being hacked.
Because your information could be at risk too. One can get into someone’s WhatsApp account and the chat logs remotely without even touching the phone. Is it possible? The good news is that it is. Google search made around the world to know to hack whatsApp account by mobile number. With increasing use of online instant messengers such as WhatsApp, a need for breaking into such accounts is surging too. How To Hack Someone's Whatsapp Account By Phone Number How To Hack Whatsapp Account Easily