Flippy Do vs CS++ AP CSA
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 CSA
This app provides a comprehensive AP Computer Science A course, featuring offline Java execution, practice questions, and coding challenges. It covers all 11 units of the College Board curriculum with detailed explanations and error callouts. Progress is saved locally, ensuring privacy and accessibility without an internet connection.
- Offline Java runtime
- 11 AP CSA course units
- Hundreds of practice questions
- Inline Java coding challenges
- Topic-by-topic explanations
- Progress saved on-device
- No account or tracking
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CS++ AP CSA is the complete AP Computer Science A course in your pocket — fully offline, with a real Java runtime built in. WHAT YOU GET • 11 units covering every topic in the College Board AP CSA Course and Exam Description (CED) • Hundreds of multiple-choice and Parsons-puzzle practice questions, with hints and explanations • 50+ inline Java coding challenges that run on your device — no internet required • Topic-by-topic explanations, code examples, and "common error" callouts • Progress saved on-device, persistent across sessions • Unit 1 (Primitive Types) is free; full course unlocks for $9.99 (one-time) THE 11 UNITS 1. Primitive Types & Output 2. Booleans & Conditionals 3. Iteration 4. Strings 5. Arrays 6. 2D Arrays 7. ArrayList 8. Recursion 9. Classes & Objects 10. Inheritance & Polymorphism 11. Searching & Sorting WHY OFFLINE The bundled Java runtime executes code locally on your device. The lesson content is shipped with the app — no streaming, no fetching, no slow connections. Use it on a plane, a school Chromebook with locked Wi-Fi, or anywhere with no signal. WHY CS++ We've taught AP CSA online at csplusplus.com to teachers and students across the United States. This app distills the full course into a focused practice tool. Same content, same alignment to the 2025-26 College Board CED, same Java subset — packaged for the device that's always in your pocket. 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 the inline Java runtime. The full unlock is a one-time $9.99 purchase that unlocks all 11 units forever, with no subscription. WANT THE EDITOR ALSO? For a free-form Java environment with multi-file projects and a templates menu, see our companion app CS++ Java IDE — same Java runtime, just an editor instead of a course. AP, Advanced Placement, and AP Computer Science A are registered trademarks of the College Board, which is not affiliated with and does not endorse this app. Built by Yellow Dart Publishing.
Screenshots
Verdict
The clearest difference is in-app purchases: Flippy Do at none against CS++ AP CSA's 1. On price, rating, ratings volume and ads 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 CSA 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 CSA. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
| Parameter | Flippy Do | CS++ AP CSA |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (2 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 3 — better | 2 |
| 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 CSA
In-app purchases
Flippy Do
No in-app purchases
CS++ AP CSA
- Unlock Full AP CSA Course$9.99
Questions
Is Flippy Do free?
Is CS++ AP CSA free?
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