The Fetal Doppler is a non‑invasive diagnostic tool used to monitor the fetus’ heartbeat and evaluate its condition. Over 78% of pregnant women worry about the health of the baby in their belly, and the opportunity to listen to its heartbeat at home is a great comfort for them. Belly Bean is a complex and modern heart rate monitor including the tool itself, the package, and the application. The designer paid special attention to the ergonomics and intuitiveness of form to increase users’ sense of safety and comfort. The use of new technologies ensured the tool’s integration with smartphones. This way, users’ experience has become a lot more comfortable in comparison with other solutions available on the market.