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.