About this app
Build stories and learn about variables at the same time! Students (or you) will assign values to variables and then watch those variables get used in a story as a way to better understand how variables work. This app is a good complement to teaching coding with Swift Playgrounds and I use it in my own classes at The Code Hub.
Latest release
What’s New
We added a new story to better teach the usefulness of variables and fixed a minor bug.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 19, 2026 · 10:12 AM $0.99
Screenshots
