Insight Timer is a great free app with tons of guided meditations. I use this daily sometimes for a guided meditation or I also use their timer. You can find some lovely chimes and gongs rather than the usual phone timer which is some what jarring when your meditating.
I'm a contributor to the app, with several published meditations. They are not smartly edited to have perfect sound or soothing music, they are what they are, straight from my heart to my phone recording, So if you would like to meditate with me for free, any time, any place here is my link to my profile.