// Practice engine for technical skills
Practice real skills.
Graded for real.
Pick a skill, drop into a live in-browser playground, and write real code that is graded the moment you hit Run. No videos. No multiple choice - just the real thing, checked by running it.
Free while we're in beta.
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HAVING COUNT(*) > 2;A scripted preview. The real editor is in the app.
// Why Prepshotz
Three things, working together.
Built around your goal
Practice the skill you actually want to get good at, sequenced so each step builds on the last.
You write real code, graded for real
Your code runs. The output or the tests decide if you got it. No opinions, no multiple choice.
It adapts to your mistakes
It watches how you fail, from your actual runs, and brings back exactly what you keep getting wrong.
All three are live today across SQL, Python, JavaScript and TypeScript. Tracks you build from your own goal are capped at 5 per account while we are in beta.
// The loop
This is the whole product.
Read the task
A clear prompt and the tables you're working with.
Write real code
A proper editor - the engine behind VS Code, not a text box.
Run
Your code executes in your browser. Nothing to install.
Graded for real
Checked by running it - the output or the tests decide.
Everything else is in service of this loop. See how it works in detail →
// Not another course site
Why it's different.
| Capability | Prepshotz | Watch-a-video courses | ChatGPT | Fixed practice sites |
|---|---|---|---|---|
| You write real code | Yes | Rarely | Sometimes | Yes |
| Graded by running it | Yes | No | Sometimes | Yes |
| Built around your goal | Yes | No | Yes | No |
| Remembers your weak spots | Yes | No | No | No |
Prepshotz is built to do all four together - build the path, run and grade your real work, and adapt to your mistakes. The other columns describe each category's general positioning; check their sites for current features.
// Skills
Four languages, live today.
Core language work, data analysis, and algorithms and data structures. Java, C++ and C# are not available yet.
// Beta
Free while we build it in the open.
Prepshotz is in beta, so everything is free right now. You get the full practice loop, new skills as they land, and a direct line to shape what gets built next. One limit while we are in beta: each account can create 5 tracks from its own goal, and a track cannot be deleted afterwards. Curated ladders are unlimited.
Start free// Questions
The quick ones.
Is Prepshotz free?
Yes - it's free while we're in beta. Tracks you build from your own goal are capped at 5 per account.
What can I practice right now?
SQL, Python, JavaScript and TypeScript. Core work in all four, data analysis in SQL and Python, algorithms and data structures in Python, JavaScript and TypeScript.
Do I need to install anything?
No. Everything runs in your browser - you write code and it's graded right there.
How is this different from ChatGPT?
ChatGPT explains, but it can't run your code against real tests or remember what you keep getting wrong. Prepshotz does both.