Runtastic

“Hang on,” you might be saying, “what’s so ‘alt’ about Runtastic? It’s just a conventional running app.” Yep, but the audiobookish Story Running feature can transform runs into terrifying sci-fi nightmares as you flee from all manner of horrors… at least if you’re armed with trainers and an imagination.

Stuff says

++++, £free (IAPS) / Android, IOS, Windows