> For the complete documentation index, see [llms.txt](https://trisavvys.gitbook.io/crack-on/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trisavvys.gitbook.io/crack-on/master.md).
# Crack On
Nail your computer science interview with Crack On!- Solve small puzzles, spark mind, train brain.- Learn algorithms, SQL.- Refresh knowledge to interview.
## [iOS mobile app in Apple Store](https://apps.apple.com/us/app/crack-on/id1509453671)
Crack On app is designed to keep your brain focused and have some time off. The app helps to develop attention and numerical skills.
Want to start coding, refresh your knowledge, then Crack On assists with it.
Nail your computer science interview with Crack On!
**Contact us: ********