CPU8 vs Logo Programming
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CPU8
Explore the inner workings of an 8-bit computer through simulation. Write, assemble, and run programs to understand computer instructions and their relationships with hardware components. Includes an assembler, sample programs, and educational resources.
- 8-bit computer simulator
- Built-in assembler with manual
- Control clock speed and single-step execution
- 16 instructions and 3 pseudo-instructions
- 7 sample assembler programs
- Links to Ben Eater videos
- History of computing content
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Students or software programmers who want to learn how computers work will love this app. CPU8 simulates the SAP-1 (Simple As Possible) 8-bit bread board computer that was famously the star of a series of videos by Ben Eater. Using it, you can control a fully realized computer that utilizes microcode to illustrate the operation of individual computer instructions and their interrelationships with general purpose registers, program counters, memory registers, instruction registers, bus and memory through "control words". In addition, CPU8 contains an assembler that allows you to write programs and convert them into the machine language of the included simulated computer. A full programming manual is included. Write, assemble and run programs using this 8-bit computer to see how the process works from start to finish. FEATURES - Assembler for the 8-bit computer (with manual) - the 8-bit computer simulator - 16 instructions - 3 pseudo instructions - 16 address spaces - control the speed of the simulated computer clock - single step through programs or run to the end - 7 sample assembler programs to get started - links to all the Ben Eater design and teaching videos - A short history of computing through the ages (37 chapters) Suitable for classroom study, independent study or just for the sheer enjoyment of playing with a computer that you can watch and learn from. No individual information is accessed. Oh, did we mention it has wonderful flashing lights!
Logo Programming
Learn programming concepts through visual art creation. This app uses a classic turtle graphics system to teach fundamental coding principles like loops and geometry. It's perfect for beginners of all ages to draw geometric patterns and develop problem-solving skills.
- Visual turtle graphics
- Learn programming concepts
- Geometric art creation
- Beginner-friendly commands
- Animated code execution
- Save and share creations
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Logo brings the classic turtle graphics programming language to your iPhone and iPad. Learn programming concepts while creating beautiful geometric art! LEARN BY DOING Logo makes programming visual and fun. Write simple commands to move a turtle around the screen, drawing lines as it goes. See your code come to life instantly with animated execution. PERFECT FOR BEGINNERS • Easy-to-understand commands (FORWARD, RIGHT, LEFT, BACK) • Visual feedback with turtle animation • Immediate results - see your drawings instantly • Built-in examples to get you started • No prior programming experience needed EDUCATIONAL FEATURES • Learn fundamental programming concepts • Master loops with REPEAT command • Understand angles and geometry • Develop problem-solving skills • Practice debugging through visual feedback CREATIVE DRAWING • Create geometric patterns and shapes • Draw spirals, flowers, and complex designs • Use multiple colors for artistic effects • Control pen width and background colors • Save and share your favorite programs POWERFUL FEATURES • Adjustable animation speed • Undo/Redo for easy experimentation • Grid overlay for precise positioning • Save unlimited programs • 25+ built-in examples • Searchable example library • Customizable turtle and canvas COMMANDS SUPPORTED • Movement: FORWARD, BACK, RIGHT, LEFT, HOME • Pen Control: PENUP, PENDOWN, SETPENCOLOR, SETPENWIDTH • Loops: REPEAT • Comments for documentation PERFECT FOR • Students learning to code • Educators teaching programming • Parents introducing kids to coding • Anyone curious about programming • Creating mathematical art ABOUT LOGO Logo is a programming language created in 1967 at MIT for teaching programming concepts to children. Its turtle graphics system has inspired generations of programmers and remains an excellent introduction to coding. SUPPORT EDUCATION Logo is free with no ads or subscriptions. Optional tips help keep it free for everyone and support continued development. Start your programming journey today with Logo!
Screenshots
Verdict
The clearest difference is review sentiment: CPU8 at 67% against Logo Programming's 0%. CPU8 also leads on rating (4.7 vs 3.0) and in-app purchases (none vs 3). On price, update cadence, ads and monetization model 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. Logo Programming sells 3 one-off in-app purchases. CPU8 asks for nothing beyond the download.
CPU8 holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: CPU8 has 14 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 67% of CPU8's written reviews are positive against 0% of Logo Programming's.
CPU8 ships an update every 3 months, Logo Programming every 2 months. Both last shipped on September 25, 2026.
| Parameter | CPU8 | Logo Programming |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (14 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 66.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 14 — better | 1 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 163 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Cordova Bay Entertainment Group, Inc | Sylvain Lafrance |
Customer experience
CPU8
Logo Programming
In-app purchases
CPU8
No in-app purchases
Logo Programming
- Logo - Donation Small$0.99
- Logo - Donation Medium$4.99
- Logo - Donation Large$9.99









