APES Prep vs CS++ AP CSP

Prepare for the AP Environmental Science exam with APES Prep — a free, offline study app covering all 9 College Board units. STUDY TOOLS • 270 multiple choice questions with instant feedback and explanations • 36 free response questions with rubric-based self-scoring and sample answers • 180 flashcards — key terms and formulas with tap-to-flip review • 65 study guide topics with exam tips • 18 formulas with worked examples • 162-term searchable glossary • Study by unit or across all topics • Quick Quiz mode with configurable question count • Review Missed mode to focus on weak areas • Full timed practice exam (80 MCQ + 3 FRQ) matching real exam format • AP score estimation (1–5) after each practice exam TRACK YOUR PROGRESS • Per-unit accuracy and completion tracking • Study streak counter • Practice exam score history • Weakest unit identification • 19 fun achievements to unlock • Bookmark questions for later review DESIGNED FOR STUDENTS • Works completely offline — no internet required • Clean, distraction-free interface • Dark mode for late-night study sessions • 5 color themes to personalize your experience • Built-in calculator for practice and exam screens APES Prep is a supplemental study tool created to help students succeed on the AP Environmental Science exam. It is not intended to replace classroom instruction or official course materials.

CS++ AP CSP is the complete AP Computer Science Principles course in your pocket — fully offline. WHAT YOU GET • 11 units covering every topic in the College Board AP CSP Course and Exam Description (CED) • Hundreds of inline multiple-choice "Check Your Understanding" questions, with hints and explanations • Lesson text written for high school students — clear, conversational, no jargon walls • Worked examples, common-error callouts, and AP-prep notes throughout • Progress saved on-device, persistent across sessions • Unit 1 (The Computer) is free; full course unlocks for $9.99 (one-time) THE 11 UNITS 1. The Computer 2. Data Representation 3. Compression & Encryption 4. Data Analysis & Visualization 5. Algorithms 6. Programming Languages & Abstraction 7. The Internet & HTML 8. JavaScript Basics 9. Procedures & Lists 10. Create Performance Task Prep 11. Impact of Computing & Exam Strategies WHY OFFLINE All lesson content is shipped inside the app — no streaming, no fetching. Use it on a plane, a Chromebook with restricted Wi-Fi, or anywhere with no signal. WHY CS++ We've taught AP CSP online at csplusplus.com to teachers and students across the United States. This app distills the full course into a focused study tool — same content, same alignment to the 2025-26 College Board CED, packaged for the device you carry every day. VIDEOS NOT INCLUDED The course videos that accompany each lesson on csplusplus.com are not bundled in the app (to keep the download small and fully offline). Each lesson includes a "Watch on csplusplus.com" link that opens the corresponding video in a browser. PRIVACY No account creation. No sign-in. No analytics or tracking. All progress lives in app storage on your device. No data is sent to our servers. THE PURCHASE The free tier covers Unit 1 — enough to evaluate the lesson format and inline checks. The full unlock is a one-time $9.99 purchase that unlocks all 11 units forever, with no subscription. AP, Advanced Placement, and AP Computer Science Principles are registered trademarks of the College Board, which is not affiliated with and does not endorse this app. Built by Yellow Dart Publishing.