Where It All Adds Up
Education
$4.99 · Designed for iPad. Not verified for macOS.
The only math app that solves every problem two ways — the U.S. method and the Japanese method, side by side.
CAS-verified, step-checked, and fully offline.
Where It All Adds Up is the only math app that shows every problem solved two ways — the way it's taught in United States classrooms and the way it's taught in Japan (日本) — side by side, so you understand the why, not just the answer.
Most solvers hand you one answer. This one teaches.
WHAT MAKES IT DIFFERENT
• Two methods, side by side — Compare the U.S. approach and the Japanese approach to the same problem and see how different classrooms think it through.
• Every step CAS-verified — A computer algebra system checks the work, so the steps are mathematically correct, never guessed.
• "Teach me" mode — Type each step yourself and get hints as you go. Learn to solve it — don't just copy it.
• Works fully offline — The entire math engine runs on your device. No account, no internet, nothing sent to a server.
WHAT IT SOLVES
Arithmetic & fractions, algebra & quadratics, systems of equations, calculus (derivatives & integrals), linear algebra (matrices, eigenvalues), word problems, and more — each worked step by step, both ways.
ALSO INSIDE
• Practice mode with generated problems and mastery tracking
• Graphing
• Snap a photo of a problem to bring it in
PRIVATE BY DESIGN
Your math never leaves your device. No sign-up. No ads. No tracking.
Whether you're a student trying to truly understand a method, a parent helping with homework, or just curious how the same problem is taught a world apart — Where It All Adds Up shows you where it all adds up.
Ratings & Reviews
The developer, Stephen Okor, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Stephen Okor
- Size
- 35.6 MB
- Category
- Education
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Stephen Okor
