Education
Proofstep: Learn & Calculate
Master math, unlock the tools
iOSfor iPhone and iPad
- $2.99 one-time purchase
- No account
- No ads or app telemetry
Screenshots
5 images · iPhone 6.7"
iPad
5 images · iPad Pro 12.9" (3rd gen)
Most calculators hand you every button on the first day, whether or not you understand what they do. Proofstep takes the opposite approach. It is a math course and a calculator in one app, and it only gives you a tool once you have learned the reasoning behind it.
You begin with addition and work forward through subtraction, multiplication, division, fractions, decimals, percentages, integers, ratios, powers, roots, geometry, algebra, equations, and functions. There are twelve stages and thirty-six lessons, each one building on the last. Every idea is shown with a visual model and worked steps, backed by a short narrated video, and followed by a quick check. Pass the five-question checkpoint and the next stage opens.
The calculator grows alongside you. Early on it holds only the operations you are studying; as you master each stage, new functions appear. Finish the whole route and you unlock a full scientific calculator with powers, roots, trigonometry, logarithms, constants, memory, history, and degree or radian modes. The tools mean something because you earned them.
It suits students working at their own pace, adults revisiting math they half-remember, and anyone who would rather understand a method than memorize it. Everything runs offline, including the videos, and your progress stays on the device. There is no account, no advertising, no tracking, and no subscription — Proofstep is a one-time paid download. It is built for iPhone and iPad with Dynamic Type and VoiceOver support.
About Proofstep: Learn & Calculate
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.
A Shadowfetch app. Published on the App Store by Robert Corbin.