The most advanced timer-app to achieve your goals, with simple interface and ability to run multiple timers, you have got all the tools and features you need in one set: Countdown and Count-up, Quick timer and Pomodoro, Interval, Stopwatch and Lap timer.
MultiTimer is a free app and it’s compatible with the iPhone, iPad, and iPod Touch.
MultiTimer is a far more sensible choice. You can have unlimited timers which are defined on your iPhone - timer type, label, colour, icon, time length - and show up in the Apple Watch app, where you can view a single timer or several at once.
MultiTimer gives you intuitive and practical controls to run sequences of timers timing several things simultaneously.