TimerLabs - TimerLabs is an interval timer that helps you with your daily routines and session based work
Cardiograph - Cardiograph is an application offered by MarcoPinch that helps you to measure your heart rate accurately.
Sportos - macOS interval timer that enhances your home workouts
Stopwatch Run Tracker - Stopwatch Run Tracker is an app that tracks the timing of your daily activities like running, jogging, yoga, gym, and sports.
HIIT Interval Buddy - Let Interval Buddy help you with your high intensity interval training - a popular method of high-impact cardio fitness training that reduces time spent in the gym and makes cardio training less of a bore.
a Training Tracker (ANT+ BTLE) - a Training Tracker (ANT+ BTLE) is one of the best mobile apps that track your daily training session details.