About this app
Finish your homework instantly. Prepare for exams without stress. Free, complete step-by-step solutions. Enter your values and calculate cumulative probabilities P(X ≤ k) and P(X > k), as well as expected value E(X), variance Var(X), and standard deviation σ – with histogram and distribution function. GET STARTED Enter your values in the correct fields and get started. You receive the solution instantly and can share it with friends or classmates. YOUR PERSONAL DATA We don’t need it. Only anonymized data is collected, for example: - which features are used - how many solutions are generated This helps us improve. No conclusions can be drawn about you. COST Everything is free to use. 24/7 access to your solutions. All solution steps are always fully available. If you need many solutions in a short time, various purchase options are available. EXTRAS - curated learning videos - feedback for incorrect inputs - manage your own solutions - app introduction CONTACT Questions and feedback via Discord or directly in the app review.
Latest release
What’s New
The latest release 'Least common multiple' is linked in the menu section now. Minor performance and UI fixes.
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 27, 2026 · 12:50 PM Free
Screenshots
