The Insight Meditation Center has a ton of introductory talks and guided meditations available for free: <a href="http:&#x2F;&#x2F;audiodharma.org&#x2F;series&#x2F;1&#x2F;talk&#x2F;1762&#x2F;" rel="nofollow">http:&#x2F;&#x2F;audiodharma.org&#x2F;series&#x2F;1&#x2F;talk&#x2F;1762&#x2F;</a> for example.<p>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 <a href="https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=de.xipa.medigong&amp;hl=en" rel="nofollow">https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=de.xipa.medigo...</a> which is also free (and has no ads, social networking features or other annoying stuff).