📱 Available on Android • iOS Coming Soon

Learn Coding.
Practice Smart.
Build Real.

Master Python, Java, Go, C with interactive visualizers, ghost-code practice, and real offline runtimes. From absolute beginner to job-ready.

Start Learning FreeBrowse 40+ Courses
🐍 Python
🔷 Go
☕ Java
⚙️ C
# Ghost Code Practice
def sort(arr):
for i in range...

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How CoderKit Works

A proven 3-step approach that turns beginners into confident developers.

1

📖 Learn

Learn with 20+ interactive visualizers - Algorithm Sandbox, Memory Manager, SQL Visualizer, Graph Visualizer and more. See exactly how code executes.

2

✍️ Practice

Write and compile code with real offline runtimes - just like desktop. Ghost Code™ type-along builds muscle memory.

3

🧪 Test

Bug Squasher, Code Scramble, and Code Refactor challenges. Find bugs, reorder code, improve structure.

Then BUILD real projects with our offline sandbox

40+ Courses Across 12 Tracks

From "Hello World" to job-ready. Powered by the Rhombus Methodology.

Universal Tracks (Mobile + VS Code)

Available on both mobile app and VS Code extension. Learn anywhere, continue on desktop.

PythonDeveloper Track
6 Courses
101Syntax & LogicBeginner
201Data StructuresIntermediate
301NumPy & PandasAdvanced
302Machine LearningAdvanced
401Flask BackendPro
402Django EnterpriseExpert

From scripting to AI & Enterprise Web

JavaEnterprise Developer
3 Courses
101Java FoundationsBeginner
201Collections & OOPIntermediate
301Web & NetworkingAdvanced

Build robust enterprise software

WebFull Stack Developer
4 Courses
101HTML & CSSBeginner
201JavaScriptIntermediate
301ReactAdvanced
302Vue.jsAdvanced

Build the visible internet

GoSystems Engineer
3 Courses
101Go FundamentalsBeginner
201Structs & InterfacesIntermediate
301ConcurrencyAdvanced

Fast software for the cloud

SQLData Engineer
1 Course
101SQL MasteryAll Levels

Schema, Joins, Queries

C
CSystems Programming
1 Course
101C FundamentalsBeginner

Low-level power

G
GroovyAutomation
2 Courses
101Groovy BasicsBeginner
201DSLsAdvanced

Automate boring tasks

ClojureFunctional Thinking
2 Courses
101Functional FoundationsBeginner
201Recursion & LogicIntermediate

Think differently

Desktop Tracks (VS Code Extension)

C++ (5)

Game Engines, STL

C# .NET (5)

ASP.NET, LINQ

Spring Boot

Java Enterprise

MERN Stack

Full Stack JS

K
Kotlin (3)

Essentials, OOP, Ktor

20+ Interactive Visualizers

See how code really works. Not just read about it.

Time Travel

Step through code line-by-line. Rewind. See variable changes.

Algorithm Sandbox

Visualize sorting, searching, BFS, DFS, Dijkstra.

Bug Squasher

Gamified debugging. Find bugs, earn points.

Ghost Code™

Type-along practice. Build muscle memory.

Memory Manager

Visualize Stack vs Heap, pointers, allocation.

SQL Visualizer

Watch tables transform with JOINs and queries.

Build with Real Offline Runtimes

No cloud compilers. No internet required. Desktop-class runtimes in your pocket.

Python 3.10
Java
Go
C
Web
SQL
Developer Keyboard - Arrow keys, Tab, and coding symbols
$ python app.py
from flask import Flask
app = Flask(__name__)
>>> Server running ✓

Learn Anywhere. No WiFi Needed.

✈️ On a plane    🚇 In the subway    🏕️ While camping    ☕ At a café
VS Code Extension

Continue on Desktop

Start a course on your phone. Continue on VS Code. Progress syncs automatically.

  • Progress syncs instantly
  • Ghost Code practice in IDE
  • Bug Squasher challenges
VS Code

CoderKit

Python - 80%
# Practice
def sort(arr):

Why Choose CoderKit?

"Why not Pydroid?"

No visualizers. No courses. No practice mode.

"Why not YouTube?"

Watching ≠ Learning. CoderKit makes you practice.

"Why not my laptop?"

CoderKit is always in your pocket.

CoderKit vs Alternatives

FeatureCoderKitPydroidAIDE
Offline Python
Go & C Support
20+ Visualizers
Structured Courses
Ghost Code Practice
VS Code Sync

Latest from the Blog

View all
Ecosystem•2024-01-10

Launch: CoderKit for VS Code

Seamlessly sync your mobile progress to the desktop with our new VS Code extension.

Updates•2023-12-01

Announcing Go Support

Write fast, concurrent software on your mobile device with our new Go compiler and course track.

Education•2023-11-15

The Rhombus Methodology Explained

How CoderKits unique 4-step learning process (Learn, Visualize, Ghost, Build) ensures you actually understand code.

Technology•2023-11-10

True Offline Coding on Android

How CoderKit brings desktop-class compilers to your mobile device without relying on internet connectivity.

Education•2023-10-25

Why Visual Learning Works Better for Coding

Discover why visualizing algorithms and memory structures accelerates programming mastery compared to traditional text-based learning.

Frequently Asked Questions

View all
How does offline execution work?

CoderKit embeds real runtimes (Chaquopy for Python, ECJ for Java, Yaegi for Go, TCC for C) directly in the app. No internet required.

Can I use NumPy, Pandas, Flask, Django?

Yes! Python comes pre-bundled with NumPy, Pandas, Matplotlib, Scikit-learn, Flask, Django, and 20+ libraries.

What is Ghost Code practice?

You see faded code and type along character-by-character. It builds muscle memory faster than passive learning.

Does the keyboard have arrow keys?

Yes! Our custom developer keyboard includes arrow keys, Tab, Ctrl, and quick access to coding symbols.

Is CoderKit free?

Yes! CoderKit is free to download with a generous free tier. Premium courses available via subscription.

How is it different from Pydroid?

Pydroid is Python-only. CoderKit offers multiple languages, structured courses, 20+ visualizers, and Ghost Code practice.

Ready to Start Learning?

Download CoderKit and master coding today.

Get on Google Play iOS Coming Soon