Comment by tathastu

The Insight Meditation Center has a ton of introductory talks and guided meditations available for free: http://audiodharma.org/series/1/talk/1762/ for example.

All you need is a timer which is already built in to most phones; if you want a slightly better timer that has a soothing chime, use https://play.google.com/store/apps/details?id=de.xipa.medigo... which is also free (and has no ads, social networking features or other annoying stuff).