Not iPhone 5 format and no DH support

Why is the screen size so tiny? Havent seen an app thats not tailored for the bigger iPhone 5 screen in a year! Why isnt the app designed similar to the Ski Tracks where it auto detects the number or runs and ascent/descent stats per run? Downloaded this app for keeping track of Downhill biking but Shouldve saved the 2.99$ And used Ski Tracks

Biggunsss about Bike Tracks, v1.1