Comparison

System Designer vs ActionLock

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

ActionLock

Transform screen time into workout time by completing exercises to unlock distracting apps. Earn XP for every rep, level up your character, and build healthy habits while staying focused.

Highlights
  • Smart app blocking
  • AI rep counting
  • Gamified fitness progression
  • Flexible screen time limits
  • Detailed exercise stats
  • Private, on-device processing
Features
Read full description

ActionLock is the ultimate app lock and digital detox tool that helps you stop scrolling, turn screen time into workout time, and make every rep part of a progression game. Instead of opening TikTok, Instagram, or YouTube and falling into endless scrolling, ActionLock gives you a healthier choice: complete a quick set of push-ups or squats to bypass the app block. You can also exercise anytime without unlocking an app! Every rep earns XP to level up your character, complete daily quests, build streaks, collect badges, and unlock new skins. HOW ACTIONLOCK WORKS - Choose your most distracting apps and secure them with our smart app lock. - Hit your screen time limit and try to open a blocked app. - Complete a quick set of push-ups, squats, sit-ups or lunges. - Earn 15 to 120 minutes of access, plus XP to level up! Every unlock becomes a small fitness win. Every urge to scroll becomes a chance to move your body, reset your focus, and build a better habit. PREMIUM FEATURES: - SMART APP BLOCK: Block social media, entertainment, and other distracting apps. Put TikTok, Instagram, X, or any selected app behind a fitness challenge. - AI REP COUNTING: ActionLock automatically counts reps using on-device movement analysis. Exercise hands-free without tapping the screen. - LEVELS & DAILY QUESTS: Watch your character level up as you complete daily quests. Earn XP, unlock achievements, and turn every workout into visible progress. - FLEXIBLE SCREEN TIME LIMITS: Choose how much app time you earn after a set. Unlock access for 15, 30, 60, or 120 minutes based on your goals. - DETAILED STATS: Track your daily, weekly, and lifetime exercise progress. - PRIVATE & ON-DEVICE: Your exercise detection is processed directly on your device. No workout videos are uploaded. A paid subscription is required to access ActionLock’s Premium features. PERFECT FOR: - Social media users who want to stop scrolling and reclaim their time. - Anyone building a digital detox or dopamine detox routine. - Professionals and students looking for the best productivity apps to maintain focus. - Users looking for a stricter app lock or screen time limit app blocker. - Anyone who wants more daily movement without a gym. GET FIT. STAY FOCUSED. BREAK THE SCROLL. Download ActionLock and start trading mindless scrolling for meaningful movement. Questions? Contact Us: team@actionlock.app Terms: https://www.actionlock.app/legal/terms-of-service Privacy Policy: https://www.actionlock.app/legal/privacy-policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

System Designer3 screens
ActionLock4 screens

Verdict

The call

The clearest difference is rating: System Designer at 4.4 against ActionLock's 1.0. System Designer also leads on in-app purchases (none vs 4) and ads (none vs shown). ActionLock's advantage is update cadence (weekly vs monthly). On price, device support and iOS requirement 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. ActionLock sells 4 in-app purchases, starting at $8.99 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 1.0. That said, the two scores are not equally well evidenced: System Designer has 17 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

System Designer ships an update monthly, ActionLock weekly. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

Scorecard6 real differences · 4 level
System Designer versus ActionLock: the parameters behind the verdict, then further details
ParameterSystem DesignerActionLock
PriceFreeFree
Rating4.4 (17 ratings) — better1.0 (2 ratings)
Positive reviews77.8% of reviews—
Number of ratings17 — better2
Update frequencyMonthlyWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.6 — better16
Further details — not scored
Size7 MB97 MB
Age rating4+4+
DeveloperErwan CarriouDung Nguyen

Customer experience

System Designer

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

ActionLock

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

System Designer

No in-app purchases

4 purchases

ActionLock

Subscriptions4
  • Monthly Premium$8.991 Month
  • Yearly Premium$19.991 Year
  • Yearly Premium$24.991 Year
Show 1 more
  • Yearly Premium3 Days trial$24.991 Year

Questions

Is System Designer free?
System Designer is free to download, with no in-app purchases.
Is ActionLock free?
ActionLock is free to download, with in-app purchases available.
Which has better reviews, System Designer or ActionLock?
System Designer is rated higher. System Designer averages 4.4 out of 5 from 17 ratings, while ActionLock averages 1.0 from 2 ratings.
Do System Designer or ActionLock have ads?
ActionLock shows ads; System Designer does not.
Which is updated more often, System Designer or ActionLock?
System Designer ships an update monthly, and ActionLock weekly. Most recently, System Designer was updated on October 6, 2026 and ActionLock on October 10, 2026.

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