Comparison

Kadmia vs RustAcademy

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

Head to head
About

Kadmia

Learn JavaScript through interactive challenges and games, focusing on fundamental programming principles rather than passive tutorials. Build your coding intuition step-by-step with engaging puzzles and immediate feedback.

Highlights
  • Interactive coding challenges
  • Gamified learning approach
  • Focus on programming fundamentals
  • Active learning methods
  • Daily progress tracking
  • Debugging practice game
Features
Read full description

Kadmia – Learn JavaScript With Games Kadmia helps you learn JavaScript by *doing*, not just watching tutorials. Most coding apps focus on passive learning—videos, long explanations, and memorization. Kadmia takes a different approach. Through interactive challenges and games, you actively build your programming intuition step by step. ### Build a Real Foundation Great programmers aren’t made by memorizing syntax. They’re built on strong fundamentals. Kadmia focuses on **first principles** of programming: * Variables and logic * Functions and flow * Problem solving * How code actually works Each concept builds naturally on the previous one, helping you develop skills that compound over time. ### Learn Through Play: Tap the Bug Our signature game, **Tap the Bug**, turns debugging into an engaging challenge. Bugs appear in your code and it's your job to spot and fix them. As you progress, the puzzles become more sophisticated—training your brain to recognize patterns and think like a programmer. It’s fast, fun, and surprisingly addictive. ### Active Learning Beats Passive Watching Instead of endless videos, Kadmia keeps you engaged with: * Interactive coding puzzles * Immediate feedback * Short learning loops * Practice that reinforces real understanding You learn faster because you’re constantly **thinking, experimenting, and solving problems.** ### Designed for Gradual Mastery Programming skill grows through consistent practice. Kadmia is designed for **daily progress**, helping you steadily expand your abilities over time. Whether you're starting from zero or strengthening your fundamentals, Kadmia helps you build the mindset and skills of a real JavaScript developer. Start learning JavaScript the way it was meant to be learned: **actively, playfully, and from first principles.**

About

RustAcademy

Learn Rust programming through focused, bite-sized lessons and daily challenges. Master core concepts, algorithms, and syntax with guided practice and code reading. Ideal for developers seeking a deeper understanding of Rust.

Highlights
  • Bite-sized Rust lessons
  • Guided practice and code reading
  • Daily recall challenges
  • Structured algorithm track
  • Code completion exercises
  • Favorite module saving
Features
Read full description

RustAcademy is a focused Rust learning companion for developers who want real understanding, one short session at a time. Instead of throwing you into long lectures, it turns core Rust concepts into clear lessons, guided practice, code reading, and daily recall. Start with the foundations, then move through ownership, borrowing, lifetimes, pattern matching, traits, generics, collections, error handling, macros, async thinking, and concurrency. Each topic helps you recognize how Rust works in actual code, not just memorize definitions. RustAcademy also includes a structured algorithm track built for Rust learners. Study binary search, sorting patterns, stacks, queues, heaps, priority queues, hashing, graph traversal, topological ordering, union-find, caching, and concurrency patterns through readable explanations and visual learning pages. The goal is simple: understand the idea, see the Rust shape, then practice until it sticks. The daily challenge gives you a fast way to keep momentum. Complete a missing Rust token, check your answer, review the solution, and return the next day with a stronger memory. These small exercises are ideal for busy learners who want steady progress without opening a full textbook. Practice screens reinforce syntax, standard library concepts, and common programming patterns. Code snippets are highlighted for readability, answer input is lightweight, and feedback is immediate. Favorite important algorithm modules, revisit tough sections, and keep your learning path organized. RustAcademy is made for beginners moving beyond tutorials, students preparing for technical interviews, self-taught developers filling gaps, and experienced engineers coming to Rust from languages like JavaScript, Python, Java, C++, Go, or Swift. If ownership rules, borrow checking, trait bounds, iterators, or lifetimes have ever felt confusing, this app gives you a calmer way to practice them. What you can do with RustAcademy: • Learn Rust fundamentals through organized topics • Practice ownership, borrowing, traits, generics, and error handling • Build confidence with code completion exercises • Take a fresh daily Rust challenge • Study algorithm patterns with Rust-centered explanations • Review stacks, queues, heaps, graphs, hashing, union-find, and LRU cache design • Save favorite modules for later review Rust rewards precision. RustAcademy helps you develop that precision by giving you repeated contact with the language in small, practical steps. Open a topic, solve a prompt, read a pattern, mark what matters, and keep going. Over time, the syntax becomes less intimidating, the compiler’s rules become more familiar, and the design behind Rust starts to feel natural. Whether your goal is systems programming, backend services, command-line tools, WebAssembly, embedded work, or interview prep, RustAcademy gives you a steady place to practice the skills that matter. Learn the rules. Read the code. Solve the challenge. Build the habit.

Screenshots

Kadmia4 screens
RustAcademy4 screens

Verdict

The call

The clearest difference is price: Kadmia at Free against RustAcademy's $6.99. RustAcademy's advantage is update cadence (every 6 weeks vs every 6 months). On ads, in-app purchases, 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

Kadmia is free to download; RustAcademy costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Kadmia ships an update every 6 months, RustAcademy every 6 weeks. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 6 level
Kadmia versus RustAcademy: the parameters behind the verdict, then further details
ParameterKadmiaRustAcademy
PriceFree — better$6.99
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 6 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.4
Further details — not scored
Size31 MB54 MB
Age rating4+4+
DeveloperKadmia LLCSimTeCon GmbH

In-app purchases

None

Kadmia

No in-app purchases

None

RustAcademy

No in-app purchases

Questions

Is Kadmia free?
Kadmia is free to download, with no in-app purchases.
Is RustAcademy free?
RustAcademy costs $6.99, with no in-app purchases.
Do Kadmia or RustAcademy have ads?
Neither Kadmia nor RustAcademy shows ads.
Which is updated more often, Kadmia or RustAcademy?
Kadmia ships an update every 6 months, and RustAcademy every 6 weeks. Most recently, Kadmia was updated on October 27, 2026 and RustAcademy on October 30, 2026.

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