The paper explores the potential of discrete time crystals (DTCs) as a resource for quantum-enhanced sensing. DTCs are special phases of matter where time translational symmetry is broken through periodic driving pulses, leading to indefinite persistent oscillations even in finite-size systems. The authors propose and characterize an effective mechanism to generate a stable DTC phase in a disorder-free many-body system. They then investigate the sensing capability of this system to measure spin exchange coupling, demonstrating strong quantum-enhanced sensitivity throughout the DTC phase. As the spin exchange coupling varies, the system undergoes a sharp second-order phase transition, transitioning from a DTC phase to a non-DTC phase, where the performance of the probe significantly decreases. The critical properties of this phase transition are characterized through finite-size scaling analysis, revealing that the transition is indeed second-order. The performance of the DTC sensor is found to be independent of the initial state and can even benefit from imperfections in the driving pulse. The study highlights the potential of DTCs as a versatile and robust platform for quantum sensing applications.The paper explores the potential of discrete time crystals (DTCs) as a resource for quantum-enhanced sensing. DTCs are special phases of matter where time translational symmetry is broken through periodic driving pulses, leading to indefinite persistent oscillations even in finite-size systems. The authors propose and characterize an effective mechanism to generate a stable DTC phase in a disorder-free many-body system. They then investigate the sensing capability of this system to measure spin exchange coupling, demonstrating strong quantum-enhanced sensitivity throughout the DTC phase. As the spin exchange coupling varies, the system undergoes a sharp second-order phase transition, transitioning from a DTC phase to a non-DTC phase, where the performance of the probe significantly decreases. The critical properties of this phase transition are characterized through finite-size scaling analysis, revealing that the transition is indeed second-order. The performance of the DTC sensor is found to be independent of the initial state and can even benefit from imperfections in the driving pulse. The study highlights the potential of DTCs as a versatile and robust platform for quantum sensing applications.