trackle GmbH is a MedTech company based in Bonn, Germany, that manufactures the trackle sensor system. This wearable device is a cycle computer designed to help women determine their fertile days using the symptothermal method. It offers a reliable, user-friendly, and non-hormonal solution for fertility tracking, whether for family planning or contraception. The company is certified by TÜV Rheinland as a manufacturer of a class IIb medical device.