Aneroid and digital sphygmomanometers are often used interchangeably but they do come with their own advantages.
Aneroids have a simpler design, requiring less training to use compared with computerised monitors which usually provide more features than aneroids. A typical analogue blood pressure monitor will offer the necessary basic function including range of measurement from zero-centimetres water systolic & diastolic readings along several pressures comparable to those of doctors' finger we are accustomed to.
Aneroids do not require batteries and they don't need a power cord when used in the office or hospital with an appropriate electrical outlet. Higher cost of printers made digitisation imperative, so have been incorporated for hospitals as well but this ignores their original purpose which is mainly concerned about measuring blood pressure at home without involving high computer technology necessarily comes into being selling them cheaper than digital based ones too much more.