Coding + System Design in one tool — launching soon
CodeAndSystem.ai

Ace your technical interview.

Coding and system design.
Solved in seconds.

Capture any Coding or System Design problem from your screen or clipboard. Get a working solution in seconds — invisible to screen shares, operable by hotkey, functional offline. Built for AI-allowed interviews.

One email at launch. No spam, ever.

Data never touches our servers
Invisible to screen shares
Works offline for 6 hours

Capture

Screenshot any problem

Analyze

AI extracts & understands

Solve

Get working solution

CodeAndSystem.ai
Ctrl/Cmd+Alt+FFull screen captured
Analyzing screenshot...
ANALYSIS
Problem: Binary Tree Maximum Path Sum
Language: Python · Constraints: -1000 ≤ Node.val ≤ 1000
SOLUTION
def maxPathSum(self, root):
    self.max_sum = float('-inf')
    def dfs(node): ...
    dfs(root)
    return self.max_sum
Ready for next capture
O(n) timeO(h) space4.2s

99%+*

accuracy

5

AI models

3

platforms

< 8s

average solve

$0

to start

*Accuracy measured on Blind 75 and NeetCode 150 problem sets during internal testing.

How It Works

Three steps. One hotkey.

The entire workflow takes under 10 seconds. Here is exactly what happens.

01

Capture your screen with a hotkey

A global keyboard shortcut captures your screen from any application — full screen, a specific window, or text from your clipboard. Works on every monitor.

Ctrl+Alt+F — full screenCtrl+Alt+W — windowCtrl+Alt+C — clipboard
02

AI reads and analyzes the problem

The AI extracts the problem statement, identifies constraints, detects the language, and structures the problem before solving. Your screenshot goes directly to OpenAI or Anthropic from your machine — no middleman server.

Typical analysis time: 3–8 seconds
03

Read, learn, or just grab the code

Solutions stream in real time. Choose how much you want to learn: Clean gives you just the code — fast enough for a live interview. Normal adds a structured breakdown with complexity and edge cases. Explanatory teaches you line by line — why this approach, why this data structure, how the pattern applies to this specific problem. Copy to clipboard with one keystroke.

Speed when you need it. Depth when you want it.
Why Switch

Same problem. Three different workflows.

ChatGPT gives you a wall of unstructured text after 60 seconds of copy-pasting. Generic interview tools skip System Design entirely and give everyone the same output. Here is what happens when the tool is purpose-built.

LLM Chat*

Slow workflow. Generic output.

  1. 1Switch to browser, upload or paste
  2. 2Write a prompt describing what you need
  3. 3Wait 30-60 seconds for a response
  4. 4Get a wall of text — no structure, no complexity analysis
  5. 5No verbosity control, no seniority targeting
  6. 6System design? Start over — wrong tool
~30-60 seconds

Competitors†

Coding only. One-size-fits-all.

  1. 1Take a full-screen screenshot — no other option
  2. 2Get one fixed output format — no verbosity levels
  3. 3No seniority targeting — same answer for junior and staff
  4. 4System design round starts — tool goes silent
~10-15 seconds

CodeAndSystem.ai

Coding + System Design. Your way.

  1. 1Press one hotkey
  2. 2Get customized, interview-friendly solutions
< 8 seconds

*LLM Chat — ChatGPT, Claude, Gemini, and similar general-purpose AI chat interfaces

†Competitors — representative products in the interview-assist category; not an exhaustive list

Try 5 solutions free — see for yourselfSee detailed comparisons →
Product Demo

See it in action

Watch the full capture-to-solution workflow in under 90 seconds.

Stay in Flow — AI Help for Engineers, Interviews, and Learning

A short audio piece about what CodeAndSystem.ai is built for: helping software engineers stay in flow, get structured solutions fast, and learn at the right level.

Use Cases

Built for developers who solve problems visually

Ace technical interviews

Practicing on LeetCode or HackerRank? Capture the problem, get a solution with full explanation, and understand the approach — time complexity, edge cases, and alternative strategies.

LeetCode, HackerRank, CodeSignal

Debug faster with context

Capture an error traceback, a failing test output, or a confusing log. AI vision reads the full context — not just the error message, but the surrounding code and state — and suggests targeted fixes.

Stack traces, error logs, test failures

Solve system design rounds end-to-end

Capture a system design prompt from your interview screen. Get a structured walkthrough: requirements gathering, API design, data model, architecture diagram breakdown, scalability analysis, and trade-off discussion.

HLD, LLD, scalability, trade-offs

Understand unfamiliar code

Screenshot a function you’re reading for the first time. Get a plain-language explanation of what it does, why it’s structured that way, and what the edge cases are.

Code review, onboarding, OSS exploration

Learn patterns by solving, not watching

Stuck on a problem? Get an explanation tuned to this specific problem — not a generic video. Three verbosity levels let you control the depth: just the code, a structured breakdown, or line-by-line reasoning with the theory behind each step.

Blind 75, NeetCode 150, pattern recognition, active learning
Why developers switch

Stop copy-pasting problems into ChatGPT

CodeAndSystem.ai reads your screen directly. Here is what that changes.

Select any region. Done.

One hotkey captures any part of your screen — IDE, browser, whiteboard, terminal. Multi-monitor support.

AI vision reads what you see

5 models across OpenAI and Anthropic extract your problem, constraints, and language from a screenshot. Auto-fallback across providers.

Recognizes your problem automatically

Detects LeetCode problems from your browser title and matches against a built-in catalog of 142 coding and 22 system design problems.

Your data. Zero middlemen.

Screenshots go straight from your machine to OpenAI or Anthropic. We never see, store, or touch your data.

Invisible during screen shares

Privacy mode makes the app undetectable in Zoom, Teams, OBS, and screen recording software. Always-on protection on Windows.

50MB installed. Launches instantly.

Built with Tauri and Rust. No Electron bloat, no background resource drain. Installs in seconds, uses minimal memory.

See all features
Pricing

Interview prep has an end date. Your billing should too.

Every plan is a one-time purchase. Pick the duration that matches your timeline, use every feature, and never think about canceling.

START FREE — No Card Required

At launch: solve 5 real interview problems in 30 minutes before you pay anything.

5 solutions30 min windowFull features
Limited Time

Founding Member Sale

Up to 51% off regular pricing — early adopter rates that won’t last.

Quick Pass$79$39-51%
Interview SprintMost Popular$99$49-51%
Prep Cycle$179$99-45%
Interview SeasonBest Value$279$169-39%

Start free: 5 solutions, 30 minutes — no card required.

-51%

Quick Pass

$79
$39
Save $40

2 weeks

-51%Most Popular

Interview Sprint

$99
$49
Save $50

6 weeks

-39%Best Value

Interview Season

$279
$169
Save $110

6 months

One email at launch. No spam, ever.

Privacy

Your data never touches our servers

Your data goes directly from your machine to your AI provider. Here is exactly how.

Your Machine

Screenshots are captured locally. The app reads your screen region and prepares the API request on your device.

Direct to Your AI Provider

The image is sent directly from your machine to OpenAI or Anthropic. It does not pass through our servers, proxies, or infrastructure.

Solution to You

The AI provider’s response comes straight back to your device. We have no access to the request, the response, or your API key.

We never see your screenshots or code
BYOK (optional) — your own API key means requests flow under your provider account and data policies, not a shared key
No telemetry on captured content
Open development — audit the code on GitHub

Read our privacy policy

FAQ

Common questions

You'll know in 60 seconds if this is worth it.

We're putting the finishing touches on it. Get notified the moment it's ready.

One email at launch. No spam, ever.