Ace every interview, invisibly.
Your PC hears the interviewer's question. A structured answer appears on your phone in under a second — while your screen stays completely blank to any recorder.
Built for interviews at companies like
00:12 · the question lands
They ask. Your mind goes blank.
Quelo whispers the answer.
On your phone in 0.8 seconds. Everyone else sees nothing at all.
Three steps. Then you just talk.
Your computer hears the question, Quelo's cloud turns it into a structured answer, and it lands on your phone — paired to your PC over your own Wi-Fi, invisible to the call.
Your computer
hears the question
Quelo cloud
writes the answer
Your phone
shows it — only to you
Your computer hears it
The desktop app runs silently in the tray, capturing the interviewer's audio from your meeting tab or mic — your choice of source.
The cloud writes the answer
Audio streams to Quelo's servers, gets transcribed, and comes back as a structured answer — behavioral, coding, system design — in under a second. Your key and data never live on your machine.
Your phone shows it
Pair your phone to your PC in 5 seconds with a QR scan over your own Wi-Fi. The answer lands there as a calm conversation — while your desktop shows nothing at all.
0.0s
Average answer latency
0
Question types covered
0%
Capture-blocked on Windows
0s
Phone pairing time
Built for the pressure of a live round.
Invisible to every recorder.
OS-level content protection excludes the answer window from every screen recorder — Zoom, OBS, proctoring tools — on both Windows and macOS. The answer never touches the shared screen.
Quelo window
not captured
Token bucket at the edge
- Redis counters per client key
- Reject at the LB first
0.8s
The recorder gets your whole screen — except the one window that matters.
Answers before you finish nodding.
Our speech pipeline transcribes the moment they stop talking, and returns a structured answer in roughly eight-tenths of a second — faster than the silence feels natural to fill.
avg. answer time
≈3× faster than typical AI chat tools
Every question type, formatted right.
Behavioral answers come back as STAR. Coding gets a working solution with complexity. System design gets an ASCII diagram. Each answer is shaped to how that question is actually scored.
Behavioral, coding, system design, ML concepts, estimation, follow-ups — each formatted for how it's actually scored.
Sharded key-value store with consistent hashing
client → [LB] → ┌ node A ┐
├ node B ┤ → replicas
└ node C ┘It ends in an inbox.
Offer letters, forwarded to us the morning after the final round.
4.9 from early users
Hi Arjun,
Congratulations! Following your final-round interviews, we're delighted to extend an offer for the Software Engineer II role at . Your compensation details are attached.
The panel was particularly impressed with how clearly you reasoned through the system-design round.
Warm regards,
· Recruiting
“Three final rounds in one week. Quelo sat on my phone through every single one.”
— Arjun M. · Software Engineer, when forwarding
Companies and figures redacted.
The interviewer asks
“Design a rate limiter that scales to a million requests per second.”
Design a rate limiter for 1M req/s
Great question! Designing a rate limiter involves several considerations, and there are multiple valid approaches — each with its own tradeoffs.
Correct — and a full essay. You can't read that aloud mid-answer.
Token bucket at the edge, Redis-backed counters
- Sliding-window counter per client key
- Redis cluster, sharded by key hash
- Reject at the LB before app servers
Three lines to say, in order. Glance, speak, done.
You lead with the approach. You sound like you already knew.
Feel it before you download.
No signup, no microphone. Pick a question — watch the handoff happen in real time.
Start free. Upgrade when it lands you the offer.
No card to try it. One simple plan when you're in.
Free trial
3 full answers to feel the difference.
Download free- 3 full answers, no card required
- All question types
- Phone pairing + invisibility
- Try the real thing before paying
Pro
Billed monthly. Cancel anytime.
- Unlimited questions, every month
- Behavioral, coding & system design
- Answers in under a second
- Invisible to screen recording
- Resume + job-description tailoring
- Answer tone controls
- iOS + Android phone support
- Works with Zoom, Meet, Teams
- Free updates forever
Sign in with Google at checkout
What happens after I subscribe?
Instant access. The desktop app is already free to download — subscribing unlocks unlimited answers.
Does it work on Mac?
Yes — macOS (Intel + Apple Silicon), Windows, and Linux builds are all live.
Is my screen really invisible?
On Windows the OS-level capture-exclude flag blocks every recorder. Equivalent protection on macOS.
Available on every platform.
Free to download. Your first 3 answers are on us — subscribe inside the app when you're ready.
Windows
Windows 10 / 11 · 64-bit
macOS Intel
macOS 11+ · x64
macOS Apple Silicon
M1 / M2 / M3
Linux
Ubuntu / Debian · x64
Unlimited answers require a subscription · View pricing
Walk into the next one
already prepared.
Download free and get your first three answers on us. No card, no catch.