A free app for Android, by Dewey Reed.

TimeR Machine helps you to create interval timer plans for all your activities. These plans include exercise, yoga, meditation, sleep, diet, and more. It helps you to achieve your goals by allowing you to set the interval between each stage. You can even use it for work or school. It will help you to learn better and be more productive.

You can set reminders for each interval stage and pause other sounds to remind you. You can listen to the voice feedback and use text-to-speech to listen to what your phone is saying. You can choose to have a vibration feedback for each interval.