twiinvoice is the ultimate work from anywhere voice app. Whether you are working from the office, at home or out on the road, the twiinvoice app from technologywithin, means that you’ll never miss a business call. It twi(i)ns your mobile with your desk phone, allowing you to make and answer calls using your business number with ease. So, you’ll only ever need to give contacts one phone number, because they’ll always be able to reach you.