Run vs Edsger

Run-C is a hands-on way to learn and practice the C programming language right on your iPhone or iPad, completely offline. Write real C code, tap Run, and see your output instantly. No internet, no accounts, and no complicated setup. Whether you are taking your first steps in programming or brushing up on the fundamentals, Run-C gives you a focused environment to experiment, make mistakes, and learn by doing. GUIDED LEARNING PATH Run-C includes 15 ready-to-run example programs organized into a Beginner Path that builds your skills step by step: - Hello World: your first program and printf - For Loop Sum: loops and integer math - If/Else: branching with conditions - Countdown: while loops and decrement - Multiplication Table: nested output in a loop - Average, FizzBuzz, Max of Three, Factorial, Power - Prime Check, GCD, Fibonacci, Hex and Char, Collatz Steps Each example comes with a short description so you understand what it teaches before you run it. A REAL CODE EDITOR - Syntax highlighting for keywords, comments, and strings - Line numbers with a clean gutter - Smart auto-indentation on new lines - Automatic bracket, parenthesis, and quote pairing - A dedicated C-symbol keyboard bar for fast access to common symbols - Live line and character counts INSTANT OFFLINE OUTPUT - Runs your C program locally on device, no network required - Clear Output console with selectable text - Separate Warnings tab that surfaces issues without cluttering your results - Error lines highlighted directly in the editor so you can find and fix mistakes fast - Run timing so you can see how quickly your program executes PRIVATE BY DESIGN Your code never leaves your device. Compilation and execution happen entirely on-device, so you can learn and experiment anywhere, even without a connection. WHO IT IS FOR - Students learning C in school or on their own - Developers who want a quick scratchpad for small C snippets - Anyone curious about how programming works, in a friendly, no-pressure environment Run-C focuses on core C language constructs for learning: control flow, numbers, strings, and basic I/O with printf. Some advanced features and system-level APIs are intentionally not supported on iOS. Questions or feedback? Email kshravi86@gmail.com.

Edsger is a coding workspace for iPhone and iPad. Write C, Python, JavaScript or Lua, press Run, and your program runs right on your device. No account, no ads, and no network needed to write or run code. Ask Edsger, the built-in AI tutor, to explain code, fix an error or walk through a math or science problem. The free tutor and coding agent run entirely on your device, so your code and questions stay private. FOUR LANGUAGES, ON DEVICE • C with PicoC, a small interpreter • Python 3.14 with the standard library • JavaScript with JavaScriptCore • Lua 5.5 Each language has its own projects, syntax highlighting, console input and Stop. AI THAT HELPS YOU LEARN • Chat: ask questions, attach documents, and get step-by-step math • Agent IDE: describe a change and the agent reads, edits and runs files in your project, with restore points • On-device models are free and work offline EDSGER PRO (OPTIONAL SUBSCRIPTION) • Dijkstra Super Fast 1.0, a faster cloud model for Chat and the Agent IDE, with a monthly AI allowance • Photos in Chat with Dijkstra • Bring your own OpenAI or Claude API key • Push projects to your GitHub account • A custom Chat note and extra colors Pro Plus includes three times the Pro allowance. Cloud AI only runs after you allow sharing, and you can turn it off anytime. HONEST LIMITS C runs in PicoC, not GCC or Clang, so some standard library features are missing. Python, JavaScript and Lua run without package installs, network access or GUIs. AI can make mistakes; review its code and don't rely on it for medical, legal or financial advice. Subscriptions renew monthly unless canceled at least 24 hours before the period ends. Manage them in your Apple Account settings. Terms: https://garrettmichae1.github.io/lilc/terms.html Privacy: https://garrettmichae1.github.io/lilc/privacy.html