Proofstep: Learn & Calculate
Master math, unlock the tools
$2.99 · Designed for iPad. Not verified for macOS.
Learn why each operation works through short lessons, visual examples, narrated videos, practice, and a calculator that grows with your mastery.
Proofstep is a complete, self-paced math route that teaches the reasoning behind each operation before adding it to your calculator.
Start with addition and progress through subtraction, multiplication, division, fractions, decimals, percentages, integers, ratios, powers, roots, geometry, algebra, equations, and functions. Each stage builds directly on the one before it.
LEARN ONE CLEAR STEP AT A TIME
- Follow 12 connected stages and 36 focused lessons.
- See every idea explained with a visual model and worked steps.
- Watch 12 short narrated micro-lessons, available completely offline.
- Complete a quick understanding check after every lesson.
- Pass each five-question checkpoint to reveal the next stage.
PRACTICE WITH PURPOSE
- Work through focused questions from every unlocked stage.
- Get a full explanation after every answer.
- Track accuracy, streaks, completed lessons, and stage mastery.
- Revisit any completed lesson or replay its video whenever you need it.
A CALCULATOR THAT GROWS WITH YOU
Proofstep begins with the tools you are learning now. New operations appear as you master the related stage. Complete the route to unlock the full scientific calculator, including powers, roots, trigonometry, logarithms, constants, memory, history, and degree or radian modes.
DESIGNED FOR FOCUSED LEARNING
- No account or sign-in.
- No advertisements or tracking.
- No subscriptions or in-app purchases.
- No internet connection required.
- Progress remains on your device.
- Built for iPhone and iPad with Dynamic Type and VoiceOver support.
Proofstep is a one-time paid download. Learn the why, practice the method, and earn every tool you unlock.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Robert Corbin, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Corbin
- Size
- 5.6 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 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 Robert Corbin
