Comparison

System Designer vs Quantum Programming Compiler

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

Head to head
About

System Designer

Design complex systems using a low-code platform that leverages UML standards. Generate code skeletons and manage components graphically. Run and test your system with dynamic type checking.

Highlights
  • UML-based system modeling
  • Code skeleton generation
  • Graphical component creation
  • MSON format for model definition
  • Dynamic type checking
  • Cross-device synchronization via GitHub
Features
Read full description

System Designer is a low-code development platform for creating systems. No matter the frameworks you use and the code you write, the most important is the model that you define to create your system. System Designer helps you to design this model and to generate the classes and components to build your system. DESIGN YOUR SYSTEM WITH EASE If you look at the different JavaScript frameworks on the market, you will notice that they all have their own way to define a model, generally only with code. System Designer uses UML, a standard, to define your model. So you probably already know how to design in System Designer even if you have never run it. The definition of the model is stored on a JSON format called MSON. With MSON you can define types, classes, one to one / one to many relationships and multi inheritance between classes. CODE THE BEHAVIOR OF YOUR SYSTEM Once you have created your model, System Designer generates the skeletons of all your methods. You only have then to add your code to implement them. System Designer provides you helpers to manage your components. You can easily navigate threw your components to create your application. CREATE COMPONENTS GRAPHICALLY There is no need to code to instantiate a component. Create a component in System Designer is like creating a document in a NoSQL Database. In fact, System Designer acts as an ODM (Object-Document Mapper) to manage your components as NoSQL Documents. RUN YOUR SYSTEM You can run your system directly from System Designer. Because you have defined a model for your application, a Dynamic Type Check is done on every action of your system. All warnings are send and shown in System Designer. DESIGN ON THE GO System Designer can be used on macOS, iPad or any browsers. System Designer has a Github module to synchronize your work between all these apps. You can begin your design on your Mac and then continue it on your iPad.

About

Quantum Programming Compiler

Learn and execute quantum computing code directly on your mobile device. This app offers tutorials for beginners and professionals, a code editor with syntax highlighting, and the ability to compile and run quantum programs using Python 3.7.

Highlights
  • Compile and run quantum programs
  • Syntax highlighting editor
  • Custom keyboard for quantum characters
  • Plotting and graphing support
  • Easy and advanced tutorials
  • Open, save, import, and share files
Features
Read full description

Write quantum codes directly on your iPhone, iPad and iPod Touch! This app is ideal for learning and testing code snippets! Quantum computing is touted as the next big thing in the computer revolution! The app allows you to learn and program in quantum! It is intended for anybody who has at least some basic programming skills. The tutorials are designed for beginners as well as professionals. The app uses the QISKit SDK and simulator (https://github.com/Qiskit/) licensed under Apache 2.0. Coding is done in Python 3.7. Features: - Compile and run your quantum program - Supports plotting and graphing - View program output or detailed error - Custom keyboard for easy input of frequently used characters - Optimized for connecting with external physical/bluetooth keyboard - Source code editor with syntax highlighting and line numbers - Open, save, import and share source files. - Easy and advanced tutorials Limitations: - Internet connection is required for compilation - Maximum program running time is 20s - One file can be run at a time - It is recommended to use no more than 8 qubits GET FULL ACCESS Upgrade to a Premium Membership and Receive the Following Ongoing Value: • No ads • Unlimited plots • Install packages • Latest interpreters If you choose to purchase a subscription, payment will be charged to your iTunes account, and your account will be charged within 24-hours prior to the end of the free trial or current period. Subscription with a free trial period will automatically renew to a paid subscription. Any unused portion of a free trial period (if offered) will be forfeited when you purchase a premium subscription during the free trial period. You can cancel the automatic renewal of your subscription at any time by going to your settings in the iTunes store after purchase. The cancellation will take effect the day after the last day of the current subscription period, and you will be downgraded to the free service. Terms & Conditions: https://kappsmart.com/quantumcompiler/terms.html Privacy Policy: https://kappsmart.com/quantumcompiler/privacy_policy.html

Screenshots

System Designer3 screens
Quantum Programming Compiler4 screens

Verdict

The call

The clearest difference is rating: System Designer at 4.4 against Quantum Programming Compiler's 3.4. System Designer also leads on in-app purchases (none vs 4) and ads (none vs shown). Quantum Programming Compiler's advantage is iOS requirement (12.0 vs 15.6). On price, ratings volume, update cadence 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. Quantum Programming Compiler sells 4 in-app purchases, starting at $2.99 per month. System Designer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

System Designer holds the better App Store score, 4.4 against 3.4. Both are backed by a comparable volume of ratings — 17 and 8 respectively. Written reviews point the same way: 78% of System Designer's written reviews are positive against 67% of Quantum Programming Compiler's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 4 level
System Designer versus Quantum Programming Compiler: the parameters behind the verdict, then further details
ParameterSystem DesignerQuantum Programming Compiler
PriceFreeFree
Rating4.4 (17 ratings) — better3.4 (8 ratings)
Positive reviews77.8% of reviews — better66.7% of reviews
Number of ratings17 — better8
Update frequencyMonthlyMonthly
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size7 MB25 MB
Age rating4+4+
DeveloperErwan CarriouKetan Appa

Customer experience

System Designer

All ratings17 ratings
Positive88.2%
Neutral0.0%
Negative11.8%
Written reviews9 reviews
Positive77.8%
Neutral0.0%
Negative22.2%

Quantum Programming Compiler

All ratings8 ratings
Positive62.5%
Neutral0.0%
Negative37.5%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

System Designer

No in-app purchases

4 purchases

Quantum Programming Compiler

Subscriptions3
  • 1 Month Subscription$2.991 Month
  • 6 Months$11.996 Months
  • 1 Year$17.991 Year
One-time1
  • Upgrade$6.99

Questions

Is System Designer free?
System Designer is free to download, with no in-app purchases.
Is Quantum Programming Compiler free?
Quantum Programming Compiler is free to download, with in-app purchases available.
Which has better reviews, System Designer or Quantum Programming Compiler?
System Designer is rated higher. System Designer averages 4.4 out of 5 from 17 ratings, while Quantum Programming Compiler averages 3.4 from 8 ratings.
Do System Designer or Quantum Programming Compiler have ads?
Quantum Programming Compiler shows ads; System Designer does not.
Which is updated more often, System Designer or Quantum Programming Compiler?
System Designer ships an update monthly, and Quantum Programming Compiler monthly. Most recently, System Designer was updated on September 18, 2026 and Quantum Programming Compiler on September 23, 2026.

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