I downloaded the atomic clock app on my iPhone6. Am I right to assume the accuracy is pretty good? I set my LPP BP to it 3 days ago. (Approx). Just took a pic of both over 3 days later. Not bad.... (I think?)
[](s556.photobucket.com/user/Waikato7/media/image.jpg1_zpsdwyxrrvr.jpg.html)