Comparison

Karel1981 vs Pseudocode, PSeInt, Visualg

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Karel1981

Learn programming with a beginner-friendly language inspired by a robot. This educational tool introduces fundamental coding concepts through interactive exercises, making it ideal for those new to computer science.

Highlights
  • Beginner-friendly programming language
  • Introduces fundamental coding concepts
  • Interactive learning exercises
  • Based on Karel The Robot book
  • Ideal for computer science novices
Features
Read full description

Karel is an educational programming language for beginners, created by Richard E.Pattis in his book Karel The Robot: A Gentle Introduction to the Art of Programming. Pattis used the language in his courses at Stanford University, California. The language is named after Karel Čapek, a Czech writer who introduced the word robot.

About

Pseudocode, PSeInt, Visualg

This app helps beginners learn programming concepts through pseudocode. It offers multiple interpretation modes and includes a code editor, offline interpreter, and flowchart visualization. Users can also share code and access learning resources.

Highlights
  • Multiple pseudocode standards (PSeInt, VisualG, AP CSP)
  • Flexible and strict interpretation modes
  • Code editor with syntax highlighting
  • Offline interpreter
  • Interactive real-time data entry
  • Flowchart visualization
  • Community sharing and rankings
Features
Read full description

Pseudocode is the perfect tool for students and beginners taking their first steps into the world of programming. Learn algorithms easily using the most widely recognized standards: * PSeInt (Spanish) * VisualG (Portuguese) * English (AP CSP) New - Interpreter Modes Now you can choose from 3 interpretation modes adapted to your learning style: * PSeInt Flexible: For a more free-flowing coding experience. * PSeInt Strict: To reinforce logical discipline. * VisualG: Optimized for Portuguese syntax. * AP CSP: Optimized for AP CSP syntax. Main Features: * Code Editor with line numbering and syntax highlighting. * Offline Interpreter: Compile and run your algorithms without an internet connection. * Interactive, real-time data entry during execution. * Shortcut bar for quick access to frequently used symbols. * Learning Resources: Syntax tutorial and practical examples. * File Management: Save and open algorithms from external storage. * Flowcharts: Visualize your algorithms graphically. * Private Cloud: Upload and securely store private pseudocode. * Community: Share code, discover algorithms, vote for favorites, and climb the rankings. * Multilingual Support: Spanish, English, and Portuguese.

Screenshots

Karel19813 screens
Pseudocode, PSeInt, Visualg4 screens

Verdict

The call

The clearest difference is in-app purchases: Karel1981 at none against Pseudocode, PSeInt, Visualg's 6. Karel1981 also leads on ads (none vs shown) and iOS requirement (9.0 vs 15.0). Pseudocode, PSeInt, Visualg's advantage is review sentiment (100% vs 67%) and update cadence (every 10 days vs every 5 months). On price, rating 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Pseudocode, PSeInt, Visualg sells 6 one-off in-app purchases. Karel1981 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Karel1981 against 4.5 for Pseudocode, PSeInt, Visualg. That said, the two scores are not equally well evidenced: Pseudocode, PSeInt, Visualg has 18 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 67% of Karel1981's written reviews are positive against 100% of Pseudocode, PSeInt, Visualg's.

UpkeepUpdate frequency

Karel1981 ships an update every 5 months, Pseudocode, PSeInt, Visualg every 10 days. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

Scorecard7 real differences · 3 level
Karel1981 versus Pseudocode, PSeInt, Visualg: the parameters behind the verdict, then further details
ParameterKarel1981Pseudocode, PSeInt, Visualg
PriceFreeFree
Rating4.5 (2 ratings)4.5 (18 ratings)
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings218 — better
Update frequencyEvery 5 monthsEvery 10 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size65 MB55 MB
Age rating4+4+
DeveloperIHPCI.org, z.s.Diego Velasquez Lopez

Customer experience

Karel1981

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Pseudocode, PSeInt, Visualg

All ratings18 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Karel1981

No in-app purchases

6 purchases

Pseudocode, PSeInt, Visualg

One-time6
  • Donation Level 1$0.99
  • Remove Ads$1.99
  • Donation Level 2$2.99
Show 3 more
  • Donation Level 3$4.99
  • Flow Diagram$4.99
  • Pseudocode Pro$7.99

Questions

Is Karel1981 free?
Karel1981 is free to download, with no in-app purchases.
Is Pseudocode, PSeInt, Visualg free?
Pseudocode, PSeInt, Visualg is free to download, with in-app purchases available.
Which has better reviews, Karel1981 or Pseudocode, PSeInt, Visualg?
Karel1981 and Pseudocode, PSeInt, Visualg are both rated 4.5 out of 5 on the App Store, from 2 and 18 ratings respectively.
Do Karel1981 or Pseudocode, PSeInt, Visualg have ads?
Pseudocode, PSeInt, Visualg shows ads; Karel1981 does not.
Which is updated more often, Karel1981 or Pseudocode, PSeInt, Visualg?
Karel1981 ships an update every 5 months, and Pseudocode, PSeInt, Visualg every 10 days. Most recently, Karel1981 was updated on October 2, 2026 and Pseudocode, PSeInt, Visualg on October 9, 2026.

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