It is called Pod Conscious. It lets you record short audio reminders and will play them back at whatever spaced time interval you choose.
It is intended to help with brain training, self awareness, focus, mindfulness or reminding yourself of anything important to you.
Examples might include - Are you present in the moment? - How is your posture? - Take a sip of water. - Stay grateful.
Its free. Check it out here
https://itunes.apple.com/us/app/pod-conscious/id1239808584?mt=8