Press ⌘⇧S on a problem, a stack trace or a slide. ChaiComet explains the approach, writes code in your editor's language and shows the time and space complexity, so you actually explain it.
No subscription. $20 for 100 credits, from $0.20 a question. Credits last a year.
ChaiComet stays open, with no icon in the Dock or on the taskbar.
It runs in the background without a row in the Mac process list or in Task Manager.
Hover or click and focus stays put. The click lands on the window behind the panel.
If the screen is recorded, the panel and the answer never show up in it.
1
Press ⌘⇧S (Ctrl+Shift+S on Windows) on the problem you're practicing.
2
Press ⌘↵. ChaiComet reads the problem and the starter code in your editor.
3
Get the approach, runnable code in your language and the Big-O, with the edge cases that break naive solutions.
Stuck on a LeetCode-style problem? See the pattern behind it (sliding window, two pointers, DP), then the code and the complexity.
Practice problem
3. Longest Substring Without Repeating Characters
Find the length of the longest substring without repeating characters.
ChaiCometReadyPattern · sliding window
Grow the window with the right edge. When a character repeats, move the left edge past its previous index.
Time O(n), one pass · Space O(min(n, alphabet))
On Windows, Ctrl replaces ⌘.
The hero is the one keystroke. This is the whole walkthrough, from the problem on screen to the written explanation.
Recruiting season moves fast. Practice more problems in less time, and walk into your screens understanding the patterns.
Years of product work, rusty on algorithms? Rebuild your DSA muscle memory with explanations, not just answers.
Turn every practice set and lecture slide into something you actually understand, for about the price of a pizza.
No subscription. Credits last a year. A question uses 1–3 credits, and failed answers give the credits back.
$0
20 credits · no card required · valid for 1 year
Try free$20
100 credits · from $0.20 a questionⓘ · valid for 1 year · no subscription
Need credits for a team, club or bootcamp? Contact us.
| ChaiComet | Typical interview copilots | Static question banks | |
|---|---|---|---|
| How you pay | Per question, $20 for 100 credits | Monthly or hourly plans | Monthly or yearly subscription |
| Subscription | None | Usually | Usually |
| What you get | Explanation, code and complexity for what's on your screen | Real-time answers during calls | Problems and written solutions |
| Built for | Practice, learning, debugging | Live conversations | Practice |
| Credits expire | After 1 year | Varies | n/a |
A desktop app for Mac and Windows that explains the coding problem, stack trace, code or slide on your screen in one keystroke: the approach, runnable code and the time and space complexity.
People practicing for technical interviews (new grads, final-year students and developers getting back into interviewing) and anyone learning or debugging code.
You get 20 free credits with no card. After that, $20 buys 100 credits. A question uses 1–3 credits, credits last a year, and there's no subscription. If an answer fails, the credits are returned.
No. You buy credits only when you need them.
Within 7 days of purchase, if the pack is unused and the terms allow it. See the terms or email contact@chaicomet.com.
It follows the language in your editor: Python, JavaScript, TypeScript, Java, C++, C#, Go and Rust. If none is visible, it uses Python.
⌘⇧S Capture · ⌘↵ Ask · ⌘R Clear · ⌘⇧H Toggle panel · ⌘↑↓←→ Move · ⌘⇧↑↓ Scroll · ⌘⇧A Sign in · ⌘⇧Q Quit. On Windows, Ctrl replaces ⌘.
| ⌘⇧S | Capture |
|---|---|
| ⌘↵ | Ask |
| ⌘R | Clear |
| ⌘⇧H | Toggle panel |
| ⌘↑↓←→ | Move |
| ⌘⇧↑↓ | Scroll |
| ⌘⇧A | Sign in |
| ⌘⇧Q | Quit |
On Windows, Ctrl replaces ⌘.
Yes. It can transcribe audio you're allowed to record, such as a lecture or your own study session, at no extra credit cost.
Capture only happens when you press the shortcut. What's sent and what's stored is described in the privacy policy and security notes.
Use ChaiComet to practice, learn and debug. In a live interview, exam or class, follow the rules you've been given.
20 free credits, no card. Then $20 for 100, with no subscription.
Try free
ChaiComet