X Challenge for iPhone
The medal is the reward. The app is the part you actually use — it records the run, counts the distance against your challenge, and decides the moment you have finished. Here is all of it.

The app has one tab bar and it does not hide anything behind a menu. This is that tab bar, top to bottom.
Medals collected, the streak you are keeping, the challenge you have running, and the activities behind them. The first screen is a status report, not a menu.

Bundles and single challenges sit under one search. Each active challenge carries its own progress bar, and a child challenge says which bundle it belongs to.

Pick the activity, press start. Pace, distance, time and steps count up on the map, and the run keeps recording with the phone locked and in a pocket.

The summary draws the route you actually took, names the time of day you ran it, and lets you replay the whole thing from the start point.

Behind the summary is the breakdown: every kilometre as its own split ranked against the others, the climb you actually did, and moving time separated from the time you stood still.

Every medal you have earned, rendered so you can turn it over and read the back. Collections track themselves — a bundle is only finished when each medal in it is.

Kilometres or miles, background GPS, which notifications reach you, your vouchers and reward history — and deleting the account, in the app, without writing to anyone.

While a run is going, the numbers live on the lock screen and in the Dynamic Island. Glance down, keep moving.


The parts that do not get a screen of their own.
Download it and look around before you buy anything — the challenge catalogue is in there too.