AP Statistics · iOS App
A structured three-layer practice system — 30 Macro-Skills, 60+ Micro-Skills across 9 units, and 50 boss-level Case Studies — designed to sharpen the statistical reasoning and exam skills that AP Statistics rewards.
StatisticsAPex mirrors how expert statisticians think — from broad conceptual fluency down to precise procedural control.
30 cross-cutting conceptual skills that appear on every AP free-response, regardless of unit. Interpreting p-values, distinguishing association from causation, validating inference conditions, understanding power — these ideas are tested implicitly in almost every question.
Each skill includes a full explanation, common pitfall, hand-authored exercises, and 10 extra-practice problems.
All 9 AP Statistics units broken into 60+ targeted micro-skills. Each one covers the exact procedure, conditions, and formula you need — plus an exam tip that explains how AP readers distinguish a 3-point from a 4-point response.
Structured to reward gradual, unit-by-unit mastery with 5 extra practice problems per skill.
50 boss-level integration problems that combine macro conceptual insight with micro procedural skill — exactly what the AP exam's hardest free-response items demand. Each problem includes a crossover point explaining why it fools even prepared students.
Progressive step disclosure forces genuine reasoning, not passive solution reading.
Every feature is designed around one goal: understanding deeply enough to write a full-credit free-response answer under pressure.
When you choose a wrong answer that matches a known misconception, you get targeted feedback explaining exactly why that reasoning fails.
Circular progress rings on every skill card. See your mastery grow problem by problem, skill by skill, across all three layers.
Numeric answers are graded with appropriate tolerance. Supports scientific notation, Unicode math symbols, and common answer aliases.
Every micro-skill includes a specific tip from the AP scoring rubric — what separates partial credit from full credit, in plain language.
Each macro-skill explanation includes the exact wrong move that mid-range students make — described clearly so you recognize and avoid it.
Case study steps unlock one at a time, forcing genuine analytical thinking before you see the next move — not passive solution reading.
Clean, focused interface designed for focused study sessions. No distractions. Works fully offline after download.
Pay once, own it forever. No subscription, no monthly fees, no paywalled updates. All future content updates included.
Don't just practice — practice deliberately. Here's how to use StatisticsAPex to reach top performance.
Begin every study session with at least one Macro-Skill. Read the explanation and common pitfall before attempting any problems. These cross-cutting concepts underpin every unit — building them first accelerates everything else.
Work through the nine units with the Micro-Skills tab. Focus extra time on Units 4–7 and 9, which together account for ~65% of exam content. For each inference skill, aim to state conditions from memory in context — not from a formula sheet.
Use Case Studies as weekly diagnostic challenges. Read the full problem, form your own answer, then reveal steps one at a time. Pay special attention to the crossover point — it tells you exactly why this class of problem trips up prepared students.
When you get a distractor feedback sheet, don't skip it. That feedback describes the specific misconception you just revealed. Understanding why the wrong answer felt right is more valuable than getting the right answer.
Strong AP Statistics performance comes from seeing how it all connects: how the CLT underpins inference, how p-value interpretation reappears across tests, and how design choices set the scope of conclusions. StatisticsAPex is built to help you practice those connections.
Try the first skills free. Unlock everything with a single one-time purchase — no subscription, ever.
Premium is a non-consumable in-app purchase. Restore purchases at any time from Settings in the app.
Prices shown in USD. Local pricing may vary by App Store region.
Everything you need to know before downloading.
Last reviewed: March 4, 2026
StatisticsAPex is designed with your privacy as a priority. We do not collect, transmit, or sell any personally identifiable information.
StatisticsAPex does not collect personal data. All app data — including your skill progress, exercise completion status, and practice results — is stored locally on your device only using Apple's SwiftData framework. This data never leaves your device.
In-app purchase transactions are handled entirely by Apple's App Store infrastructure. StatisticsAPex does not receive or store your payment information. Your premium entitlement status is verified locally through StoreKit and cached in your device's Keychain.
StatisticsAPex does not include third-party analytics, advertising SDKs, tracking pixels, or crash-reporting services that transmit data to external servers.
StatisticsAPex does not collect any data from users of any age. The app is suitable for use by students under 13 without parental concern regarding data collection.
For privacy questions, contact: jtscientific2016@gmail.com
By downloading or using StatisticsAPex, you agree to these Terms of Service. If you do not agree, please do not use the app.
StatisticsAPex grants you a personal, non-transferable, non-exclusive license to use this app on Apple devices you own or control, subject to the Apple Media Services Terms and Conditions.
The premium in-app purchase is a non-consumable, non-refundable one-time payment processed by Apple. Refund requests must be submitted directly to Apple through the App Store. All purchases can be restored on any device signed into the same Apple ID.
StatisticsAPex is licensed for personal, non-commercial educational use only. You may not copy, modify, distribute, sell, or sublicense the app or its content.
While we strive for accuracy, StatisticsAPex educational content is provided for study purposes only and should not be treated as the sole source of instruction. AP Statistics courses and official College Board materials remain the authoritative source.
To the fullest extent permitted by law, JT Scientific shall not be liable for any indirect, incidental, special, or consequential damages arising from the use of StatisticsAPex, including but not limited to exam outcomes or academic performance.
We reserve the right to update these Terms. Continued use after changes constitutes acceptance of the updated Terms.
For terms-related questions: jtscientific2016@gmail.com
AP® and AP Statistics® are registered trademarks of the College Board. StatisticsAPex is an independent educational application and is not affiliated with, endorsed by, or sponsored by the College Board in any way.
StatisticsAPex is an independent study aid. It is not a substitute for classroom instruction, official College Board coursework, or AP exam preparation resources published by the College Board. Exam scores depend on many factors beyond any single preparation resource.
Use of StatisticsAPex does not guarantee any specific AP exam score, grade, or academic outcome. Individual results will vary based on study habits, prior knowledge, classroom preparation, and other factors.
StatisticsAPex is continuously improving VoiceOver support, Dynamic Type behavior, and interaction clarity. If you encounter an accessibility barrier, please contact us and include your device model, iOS version, and a brief description of the issue.
StatisticsAPex is provided "as is" without warranties of any kind, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement.