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The #1 AI CopilotBuilt for Technical Interviews

Native macOS stealth, sub-second answers, and interview memory in one calm copilot that stays invisible while you think.

Screen-share invisibleLive Q&A + context memoryFree trial, no card
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Try it free on macOS · 2-minute setup · No credit card

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100%Sat 3:42 PM
Technical Interview
Frontend Engineer Interview
Recording00:15:42
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100% Private and Undetectable

REC
INInterviewer
YouYou
Solve⌘↵
def two_sum(nums, target):
seen = {}
for i, n in enumerate(nums):
if target - n in seen:
return [seen[target - n], i]
seen[n] = i
return []
Your view
REC
INInterviewer
YouYou
Interviewer view
Invisible on calls

Screen share

Share a tab, a window, or your whole screen — Cowinx stays out of what your interviewer sees. Verified on every platform we support.

Activity MonitorMy Processes
CPUMemoryEnergyDiskNetwork
Cowinx

“Cowinx” App Not Found

No apps or background tasks with that name could be located.

No process trace

Activity Monitor

Other assistants show up by name, with an icon, spiking CPU. Cowinx keeps a neutral, near-idle footprint — search for it and nothing comes up.

Solve⌘↵
⌘ ⇥Finder
No app icon

Dock & ⌘-Tab

Cowinx does not appear in the Dock or the ⌘-Tab switcher. It stays out of sight from launch.

Invisible in screenshots?No recording indicator?No surprise pop-ups?Click-through safe?Cursor undetectability?Never steals focus?

Verified across all major platforms

Tested daily

Full capabilities to supercharge your interview

AI Solve

Sharp, Structured Answers

CowinxStreaming
TL;DRRead-heavy — cache the read path.
Requirements100M reads/day
ArchitectureID gen · cache · CDN
Componentsbase62, Redis, KV
Trade-offshashing vs. counter
SayOpen with the core trade-off

Behavioral, coding, or system design — Cowinx gives you a tight, structured answer you can read at a glance and say out loud. Key points first, no rambling, always on the actual question.

Vision

On-Screen AI Analysis

Sliding window
Approach
Hash map, one pass
ComplexityO(n) time
for i, n in enum(a):
if t - n in seen:
return [seen[t-n], i]

Cowinx reads the problem straight off your screen and walks you through it in real time: the optimal approach, the complexity, and working code.

Audio

Live Transcription That Knows Jargon

InterviewerLive

…served it on vLLM, PagedAttention for the KV cache…

Recognized terms
PyTorchRoPEFlashAttention-3LoRAvLLMAWQINT4

Highly accurate technical transcription that captures the specialized terms — APIs, frameworks, algorithms — that other tools mangle.

Translation

Cross-Language Interviewing

EN 中文
Heard

How would you ensure exactly-once delivery?

Translated

你会如何保证消息的精确一次投递?

Interviewing in another language? Cowinx translates each turn live, so you follow every question and answer with confidence.

Built for technical interviews

Coding

LeetCode, live

  • Question read from speech or straight off your screen
  • Optimal approach and complexity — not a brute force
  • Clean, working code in Python / Java / Go / TS
00:00:11DoneScreenshot ⌥SSolve ⌥↵Hide ⌥H
python
def length_of_longest(s):
seen = {}
left = ans = 0
for right, ch in enumerate(s):
if ch in seen and seen[ch] >= left:
left = seen[ch] + 1
seen[ch] = right
ans = max(ans, right − left + 1)
return ans
O(n) timeO(k) spacesliding window

Why Cowinx

CapabilityCowinxTypical AI tools?
Hears the interviewer reliably?
Cuts out mid-interview?
Accurate in English, Chinese & more?
Weak on other languages?
Sharp, structured answers?
Long, robotic, off-point?
Screenshot question solving?
?
Real-time translation?
No live translation?
Stays out of your screen share?
?
No screen-recording indicator?
Trips the recording dot?
Never reveals itself mid-interview?
“Credit too low” pops up?
Never steals focus · no Dock / ⌘-Tab?
Flagged as tab-switching?
Near-idle in Activity Monitor?
Shows up by name?
Never cut off mid-interview?
Drops, interview wasted?
Risk of being noticed
Very lowHigh
Competitor data from public user reports.Hover the ? for details · last updated June 2026

Frequently Asked Questions

Yes. Download Cowinx and get 30 minutes of interview time plus 30 screenshot answers, completely free — no credit card required. It is the same frontier AI and the same stealth as the paid passes, so you can see exactly how it performs in a real interview before paying anything.

Yes. Cowinx listens to your call audio directly, so it picks up the interviewer’s questions in real time — and it keeps working even when you wear headphones.

Yes. Take a screenshot of the problem — a LeetCode-style question, a take-home, or a shared coding doc — and Cowinx returns a working solution with a clear explanation you can talk through.

Yes. Add your résumé, the job description, or any background notes, and Cowinx tailors its answers to your experience and the role instead of giving generic responses.

Yes. Cowinx supports interviews in multiple languages and can even show you a live translation as the interviewer speaks — useful when you are interviewing in a second language.

Zoom, Microsoft Teams, Google Meet, Webex, FaceTime, and more. Cowinx works alongside any of them.

Up to 3 hours per session — longer than virtually any interview round you will face.

We built Cowinx for macOS first so we could deliver stealth and reliability we are fully confident in, rather than ship a weaker experience everywhere.

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