I use babybloom. Music prenatal education can stimulate the baby's brain and promote the baby's development. This is a sound that the baby has never been exposed to before, so it can attract the baby's attention. Babybloom music prenatal education instrument can be listened to not only by babies, but also by expectant mothers. Not only can it be used for prenatal education, but listening to prenatal education music can relieve the mood of expectant mothers and is beneficial to fetal development. The effect of prenatal education will be better.
Personally, I recommend babybloom, which can also filter high-frequency sounds in music and reduce the whole song to below 2000 Hz.