Flippy Do vs CS++ AP CSP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flippy Do
Practice converting binary numbers to decimal with this educational tool. Ideal for computer science students and anyone looking to understand base 2 to base 10 conversions. A simple yet effective way to learn binary.
- Binary to decimal conversion practice
- Base 2 to base 10 learning
- Educational tool for computer science
- Simple and effective learning aid
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Flippy Do is an application for practicing converting binary numbers into decimal numbers (base 2 to base 10). Students taking computer science principles often make a Flippy Do out of paper. Look up online how to make the paper version as well. If you want to learn to read binary a Flippy Do is a great place to start!
CS++ AP CSP
This app provides a comprehensive, offline AP Computer Science Principles course. It features 11 units aligned with the College Board curriculum, interactive quizzes with explanations, and clear, jargon-free lessons. Progress is saved locally, ensuring accessibility anywhere.
- 11 AP CSP course units
- Offline access
- Hundreds of practice questions
- Clear, conversational lessons
- On-device progress saving
- AP-prep notes and examples
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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.
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Verdict
The clearest difference is in-app purchases: Flippy Do at none against CS++ AP CSP's 1. Flippy Do also leads on ratings volume (3 vs 1). On price, rating, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. CS++ AP CSP sells 1 one-off in-app purchase. Flippy Do asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Flippy Do against 5.0 for CS++ AP CSP. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
| Parameter | Flippy Do | CS++ AP CSP |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 3 — better | 1 |
| Update frequency | — | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.2 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Groeneveld | Kevin Hare |
Customer experience
Flippy Do
CS++ AP CSP
In-app purchases
Flippy Do
No in-app purchases
CS++ AP CSP
- Unlock Full AP CSP Course$9.99
Questions
Is Flippy Do free?
Is CS++ AP CSP free?
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