That’s a thing any time you decide you want one bad enough to find and buy it, or make it yourself. For far less than the cost of your cellphone you can contract with people who know how to make you a 3D printed little bug that does exactly that digital recording, possibly leveraging your phone to do most of the storage and user interface work.
That hasn’t been a thing since Bell telephone landlines.
That’s a thing any time you decide you want one bad enough to find and buy it, or make it yourself. For far less than the cost of your cellphone you can contract with people who know how to make you a 3D printed little bug that does exactly that digital recording, possibly leveraging your phone to do most of the storage and user interface work.