German high schooler builds step-by-step guide app for a tricky calculator
A high school student in Germany noticed that most classmates could not properly use the calculator, even though it is required in nearly every math course. Some teachers also struggled with certain functions, and existing YouTube tutorials lacked practical classroom context. To solve this, the student is building CASify, an iOS app that walks users through the calculator's features step by step with tips and tricks.
The app is currently in German only and in pre-launch beta, with Android and English versions planned later. Interested students can join a waitlist at casify.website to get when testing begins.
Key points
- The idea came directly from the builder's own frustration — a reliable signal for real demand
- Targets a very specific niche: students who must use one particular calculator model
- Uses a pre- to gather before official release
- Currently German and iOS only; Android and English versions are on the roadmap
- Sign up at casify.website to join the beta waitlist