# Faraday: STEM & Exam Prep — Offline STEM lessons & exams > Offline STEM lessons & exams (iPhone/iPad app by ETAP.) - Source: https://appshunter.io/ios/app/faraday-stem-and-exam-prep/id6781682888 (this page in markdown: same URL + `.md`) - Developer: [ETAP](https://appshunter.io/developer/1357782024) - Category: Education - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 16.0 · 99 MB - Languages: American English - Released: 2026-08-19 - Data updated: 2026-09-18 - User reviews in markdown: https://appshunter.io/ios/app/faraday-stem-and-exam-prep/id6781682888/reviews.md ## What is Faraday? 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. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Full Course Unlock | $49.99 | one-time | ## Version history (last 5 releases) ### 0.1.5 — 2026-09-06 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. ### 0.1.3 — 2026-08-31 More of every course is now free. - The whole first area of each course is free to explore, not just the opening lessons - 64 courses, 3,200+ lessons, 13,000+ practice questions with worked solutions Feedback welcome from the Profile tab. ### 0.1.2 — 2026-08-29 aFixes and refinements. - Purchases now tell you when something goes wrong, instead of failing silently - Switch courses from any tab, not just Learn - The catalogue now shows how many courses are included - Optional crash reporting, off by default, in Profile > Preferences Feedback welcome from the Profile tab. ### 0.1.1 — 2026-08-24 A small maintenance update. • Refreshed the privacy policy and terms inside the app. • Behind-the-scenes work so we can track down and fix crashes in a future update. Your courses, streaks and progress are untouched. ### 0.1.0 — 2026-08-19 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-18.*