Faraday: STEM & Exam Prep

Offline STEM lessons & exams

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Master STEM one lesson at a time. Faraday makes studying something you actually want to do. Short, game-style lessons. Instant feedback. Progress you can watch happen. No wall of PDFs, no lecture videos, no account to create. Pick from 64 courses across maths, science, engineering and computing. Every lesson pairs a focused teaching segment with practice questions, and every question comes with a full worked solution, so you find out why you got it wrong while it still matters. Build a streak. Earn XP. Unlock achievements. Spend your gems. Come back tomorrow because you want to, not because you ought to. WHAT YOU CAN LEARN Calculus, Algebra, Geometry and Linear Algebra. Physics, Chemistry, Biology and Astronomy. Machine Learning, Cybersecurity, Databases and Operating Systems. Economics, Personal Finance, Psychology and Rocketry. Plus AP, SAT and GRE preparation, and full PE Power and FE Electrical & Computer licensure prep with timed, per-area mock exams. Switch courses whenever you like. WHAT YOU GET • 13,000+ practice questions across 64 courses and 522 knowledge areas • Step-by-step worked solutions, with formulas rendered properly • Full-length timed mock exams with per-area score breakdowns (engineering courses) • Smart review that brings missed questions back on a spaced schedule • Streaks, streak freezes, daily goals, XP, achievements and gems • Progress tracked for every knowledge area WORKS ANYWHERE Everything lives on your device. No account, no sign-in, no internet after install, no ads, no tracking. Study on a plane, on the train, in a basement lab with no signal. Your progress never leaves your phone. ONE PURCHASE, NOT A SUBSCRIPTION Start free, then unlock the whole catalogue once. No monthly bill, ever. Faraday is an independent study aid and is not affiliated with, authorized, sponsored or endorsed by NCEES, the College Board, or ETS. Exam names are used only to describe the exams this material helps you prepare for.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

One purchase unlocks all 64 courses - now the app actually says so. • The unlock screen was still written for a single course. It now shows what you really get: every lesson in all 64 courses, a worked solution on every question, and no subscription • Restore purchase is always reachable, not hidden below the fold Feedback welcome from the Profile tab.

Version 0.1.5

The developer, ETAP, 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:

    • Purchases
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Operation Technology, Inc.
Size
103.9 MB
Category
Education
Compatibility
Requires iOS 16.0 or later.
  • iPhone
    Requires iOS 16.0 or later.
  • iPad
    Requires iPadOS 16.0 or later.
  • Mac
    Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 ETAP
  • Privacy Policy

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