The well-designed Runtastic app offers four training plans, from novice to competitive. The coaching advice is nuanced and thoughtful, helping runners understand the right pace depending on the goals of the day. But we found the huge ranges for per-mile pace too vague to follow.
Dieter Baumann, an elite 5K runner who won gold for Germany in the 1992 Olympics and silver in 1988.
The female English-language option is breathy and enthusiastic, like a Mean Girls-era Lindsay Lohan.
Marathon coaching plans, $24.90; for iPhone and Android.