Onoff is described as 'Get multiple phone numbers on your current phone, instantly. Onoff Numbers work with your regular SIM card & monthly contract - switch them ‘on’ or ‘off’ to control your availability and access them from any smartphone' and is a Social Network in the social & communications category. There are more than 25 alternatives to Onoff for a variety of platforms, including Android, iPhone, Online / Web-based, Windows and Android Tablet. The best alternative is WhatsApp, which is free. Other great apps like Onoff are Hangouts, Viber, Facebook Messenger and aTalk.
Download the VirtualPhone.com app for iPhone and iPad. Use your iPhone to place and receive calls and text messages to any phone number or SIP device. View and manage your all your customer communications through your iPhone.