In the past few years, we have covered plenty of iPhone compatible stethoscopes, EKG sensors, and blood pressure monitors here that help you keep a close eye on your heart health. The 3M Littmann CORE Digital Stethoscope is also worth a look. It connects to the Eko app to visualize heart waveforms. It also comes with 40x amplification.
The 3M Littmann Digital Stethoscope comes with active noise cancellation to reduce unwanted background sounds. It has analog and digital modes. With the Eko software, you can save and share sounds with others. This stethoscope comes with soft-sealing ear tips and a dual-sided stainless steel chestpiece.[where to get it]