Is Stealth Interview an InterviewHammer alternative?

Only if you want help during the live round. InterviewHammer's App Store listing describes mock interview practice with AI answer suggestions. Stealth Interview runs during the employer's actual interview and returns a working solution to the coding problem on your screen.

Does InterviewHammer work on Windows?

Its App Store listing covers iPhone, iPad, Mac and Apple Vision. We found no Windows build. Stealth Interview is a desktop application for both macOS and Windows.

Does InterviewHammer read coding problems from the screen?

Its listing does not say so. The input it describes is audio during mock interview practice, and it names no coding assessment platforms.

What does each one cost?

InterviewHammer is free to install with in-app purchases from $0.99 to $29.99, the top tier being monthly unlimited, per its App Store listing in August 2026. Stealth Interview is $49 a month, $150 for six months or $250 for a year.

Which coding platforms does Stealth Interview cover?

CoderPad, HackerRank, CodeSignal and LeetCode, alongside Zoom, Google Meet, Microsoft Teams and Webex.

InterviewHammer Alternative: Rehearsal Is Not the Round

InterviewHammer's App Store listing (August 2026) describes mock interview practice. That's rehearsal. Stealth Interview runs during the employer's actual round, on macOS and Windows.

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Rec00:23:52Technical interview · 45 min

{}PYsolution.pyREADME.mdRunShared editor · Python 3

# Write your code here

def length_of_longest_substring(s: str) -> int:

last_seen = {}

left = best = 0

for right, ch in enumerate(s):

if ch in last_seen and last_seen[ch] >= left:

left = last_seen[ch] + 1

Test casesConsoleRun your code to see the output.

Case 1Case 2Case 3

Inputs = "abcabcbb"

Expected3

Problem

Longest substring without repeats

Medium

Given a string s, return the length of the longest contiguous substring in which every character is unique.

Example

in s = "abcabcbb"

out 3 ("abc")

Constraints

0 ≤ len(s) ≤ 50,000
s may contain letters, digits, symbols and spaces.

Hint 1Hint 2Topics

Auto-saved

DWARConnected · 2 participantsLn 1, Col 1Spaces: 4UTF-8Python 3

You are sharing your screenStop sharing

Dana Whitfield· Interviewer

You

Participants2Chat

DWDana WhitfieldInterviewer

ARYouSharing screen

RecThis meeting is being recorded.

Message everyone

MuteStop videoShare2ParticipantsChatReactionsLeave

Rec00:23:52

Dana

You

You are sharing your screenStop sharing

PYsolution.pyRun

Longest substring without repeatsMedium

# Write your code here

def length_of_longest_substring(s: str) -> int:

last_seen = {}

left = best = 0

for right, ch in enumerate(s):

if ch in last_seen and last_seen[ch] >= left:

left = last_seen[ch] + 1

2Leave

90%Subscription

python

Please analyze this context and help me answer the question or solve the problem.

Transcript

"Okay, next one. Given a string, return the length of the longest substring that has no repeating characters. Walk me through your approach before you code it."

Technical interview · 45 minsolution.pyShared editor · Python 3Longest substring without repeatsMediumGiven a string s, return the length of the longest contiguous substring in which every character is unique.s = "abcabcbb"
→ 31def length_of_longest_substring(s: str) -> int:2 last_seen = {}3 left = best = 04 for right, ch in enumerate(s):5 if ch in last_seen and last_seen[ch] >= left:

python

def length_of_longest_substring(s: str) -> int:    last_seen = {}                    # char -> index    left = best = 0    for right, ch in enumerate(s):        if ch in last_seen and last_seen[ch] >= left:            left = last_seen[ch] + 1  # jump past it        last_seen[ch] = right        best = max(best, right - left + 1)    return best    last_seen = {}                    # char -> index

Approach

At each index r, the window's left edge is:

left r = max (left r -1, last[s r] + 1)

Time O(n): each character enters and leaves the window once.
Space O(min(n, k)): k is the size of the character set.

Type your message...

GPT-6.1 Terra

Transcribing...

90%Subscription

python

Please analyze this context and help me answer the question or solve the problem.

Transcript

"Okay, next one. Given a string, return the length of the longest substring that has no repeating characters. Walk me through your approach before you code it."

python

def length_of_longest_substring(s: str) -> int:    last_seen = {}                    # char -> index    left = best = 0    for right, ch in enumerate(s):        if ch in last_seen and last_seen[ch] >= left:            left = last_seen[ch] + 1  # jump past it        last_seen[ch] = right        best = max(best, right - left + 1)    return best    last_seen = {}                    # char -> index

Approach

At each index r, the window's left edge is:

left r = max (left r -1, last[s r] + 1)

Time O(n): each character enters and leaves the window once.
Space O(min(n, k)): k is the size of the character set.

Type your message...

GPT-6.1 TerraClear chat

Transcribing...

QuitEscHide+QCapture+PCrop+OSubmit+EnterPress to get answerLeft/Right+Up/Down+

90%Subscription

python

Please analyze this context and help me answer the question or solve the problem.

Transcript

"Okay, next one. Given a string, return the length of the longest substring that has no repeating characters. Walk me through your approach before you code it."

python

def length_of_longest_substring(s: str) -> int:    last_seen = {}                    # char -> index    left = best = 0    for right, ch in enumerate(s):        if ch in last_seen and last_seen[ch] >= left:            left = last_seen[ch] + 1  # jump past it        last_seen[ch] = right        best = max(best, right - left + 1)    return best    last_seen = {}                    # char -> index

Approach

At each index r, the window's left edge is:

left r = max (left r -1, last[s r] + 1)

Time O(n): each character enters and leaves the window once.
Space O(min(n, k)): k is the size of the character set.

Type your message...

GPT-6.1 TerraClear chat

Transcribing...

Primary display

QuitEscHide+QCapture+PCrop+OSubmit+EnterPress to get answerLeft/Right+Up/Down+

Works with

Zoom
Meet
Teams
Webex
CoderPad
HackerRank
CodeSignal
LeetCode

Reviewed August 2026

The row that decides itWhat it is for

Stealth Interview: The live interview itself
InterviewHammer: Its App Store listing describes mock interview practice and answer suggestions

Stealth Interview compared with InterviewHammer across 9 capabilities.
Capability	Stealth InterviewLive technical interview copilot	InterviewHammerWhole-interview copilot
Native desktop appA macOS and Windows application, not a browser tab.	macOS and Windows	Apple platforms only
Built for the live roundAnswers during the interview itself, not a practice session after it.	Yes	Practice, per its listing
Reads the problem off your screenCapture the question where it appears and get a working solution back.	Yes	Not stated
Full explanation and complexityEvery solution arrives with the reasoning and its time and space cost.	Yes	Not stated
System design and OODArchitecture answers with a diagram, not only algorithm problems.	Yes	Not stated
Live interviewer audioWhat is asked out loud is transcribed and used as context for the answer.	Yes	Listens during practice
Named assessment platformsThe tools interviewers actually run problems in.	CoderPad, HackerRank, CodeSignal, LeetCode	Not stated
Choose your modelPick the engine per question instead of taking one fixed model.	6 models across the plans	Not stated
Published priceWhat the vendor's own pricing page showed when it was read.	$49 / month · $150 / 6 months · $250 / year	Free · in-app $0.99 – $29.99

NoteWe filled in their column from their own website, so “Not stated” means we could not find it — not that it is missing. Prices and features change, so check theirs before you buy. Last reviewed August 2026. Sources: apps.apple.com.

What InterviewHammer actually is

InterviewHammer's App Store listing (August 2026, version 3.4.0, published by Zipo Apps Ltd.) describes preparing for job interviews with AI answer suggestions, role guidance and real-time practice support.

InterviewHammer is distributed as an Apple app. Its App Store listing (August 2026) covers iPhone on iOS 16 or later, iPad on iPadOS 16 or later, Mac on macOS 10.15 or later and Apple Vision on visionOS 1.0, published by Zipo Apps Ltd. at version 3.4.0.

The listing describes the product around practice: it says the app listens during mock interview practice, analyses the questions being asked and suggests responses tailored to your role and industry.

We tried to read interviewhammer.com in August 2026 and it returned no readable content beyond the page title, so everything on this page is sourced from the App Store listing the vendor publishes — not from marketing copy we could not verify.

Everything about InterviewHammer on this page was read on its own site (opens in a new tab) in August 2026. Where its pages are silent we say so; we don't test rivals' software or guess what it does.

Where it costs you in the round

Its listing describes mock interview practice. Nothing in it describes sitting alongside a live employer interview, which is the whole job here.
No meeting platform is named in the listing we read: no Zoom, no Google Meet, no Teams.
No coding assessment platform is named either, and reading a problem off the screen is not mentioned. The input it describes is audio, during practice.
Pricing is a range of in-app purchases, $0.99 to $29.99 for monthly unlimited, so what you pay depends on which ones you make rather than on a published plan.
Its listing covers Apple platforms only, and we found no Windows build. On a Windows machine it is not an option.

Credit where it's due

It is on Apple platforms Stealth Interview does not reach at all: iPhone, iPad and Apple Vision.
Free to install, with in-app purchases rather than a subscription you commit to before trying it.
Distribution through the App Store means a review process, a named developer and a visible version history — more accountability than an unlisted download.
Its listing is modest about what it does. It describes practice support rather than claiming to beat proctoring, which is a more honest position than most pages in this category take.

How the two are built

These are not the same kind of product, and the useful thing this page can do is say so rather than force a feature grid onto two tools that do different jobs. InterviewHammer's App Store listing describes practice: the app listens during a mock interview and suggests answers. Stealth Interview runs during the employer's actual round and returns working code for a problem on the screen.

The delivery shapes follow from that. A practice tool belongs on a phone, which is where InterviewHammer primarily ships — iPhone, iPad, Mac and Apple Vision. A live coding assistant has to be on the machine the interview happens on, which is why we are a macOS and Windows desktop application and nothing else.

The inputs differ too. The listing describes audio during practice; there is no mention of reading a coding problem off the screen, and no assessment platform is named. That is not a gap in a rehearsal product — it is simply not what it is for.

We have not tested InterviewHammer against a proctored assessment, and nothing on this page claims what any platform can or cannot observe when either product runs.

What the platforms actually document

The detection question is really three questions, because the platforms run three different regimes. HackerRank's own knowledge base (August 2026) documents Secure Mode as a controlled browser environment: full screen enforced, copy and paste blocked, multiple monitors prevented, tab switches flagged. Proctor Mode keeps all of that and adds screenshot analysis, plagiarism detection and webcam anomaly detection.

Desktop App Mode is a different regime entirely. HackerRank documents it as a lightweight desktop application the candidate installs on Windows or macOS, which blocks other applications for the duration of the test — its documentation names video conferencing, messaging and LLM applications — detects and closes programs opened during the test, prevents screen sharing and screenshots, checks continuously for multiple monitors and screen mirroring, refuses to run on a virtual machine, and blocks remote access.

Read that list before you shop. If an employer sends you a HackerRank assessment in Desktop App Mode, the honest answer is not a different overlay — it is to sit the assessment on your own merits and put your preparation into the patterns it will actually ask about. Any vendor that tells you otherwise, including this one, would be selling something it cannot deliver.

The test is in a tab. The answer isn't.

Unless Desktop App Mode is on, a HackerRank test is a web page. Stealth Interview runs outside it, in a desktop window set to be excluded from screen capture.

It doesn't change what the webcam sees, the editor's own record of pastes and typing, or a browser noticing focus leave the test, and we haven't tested every browser and OS version a test runs on. Desktop App Mode is HackerRank's own native app, documented to close other programs: plan on Stealth Interview not running beside it, and prepare with the hash map pattern instead.

What each HackerRank mode records

Built for the round itself

Stealth Interview runs during the live interview: the problem appears on your screen, you capture it, and a working solution comes back. It is not a rehearsal tool and does not pretend to be one.

The screen is the input
A coding question is rendered, precise and long. We read it directly rather than listening to someone read it aloud, and return code with a step-by-step explanation and its time and space complexity.
Invisible to screen sharing
The app draws its own window and that window is not captured by screen-sharing or meeting software, across Zoom, Google Meet, Microsoft Teams and Webex.
Windows as well as macOS
A desktop application for both, which matters when the machine you interview on is the one your employer issued.

When InterviewHammer is the better buy

You want to practise, not to be helped live: The App Store listing describes mock interview practice and answer suggestions tailored to your role. That is a genuinely different product from a live copilot, and for a lot of people it is the more useful one — preparation you can do on a bus beats assistance you have to operate under pressure.
You are on iPhone, iPad or Apple Vision: Stealth Interview is a desktop application for macOS and Windows. There is no iOS build, no iPad build and no visionOS build. On those devices InterviewHammer is available and we are not.
You do not want a subscription up front: It is free to install with in-app purchases from $0.99. Our plans start at $49 a month. If you want to try something before paying anything, that is the lower-commitment path.

What the round is worth

Every plan on this page costs less than one offer is worth. The question is which one was built for the round.

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Company names and logos are trademarks of their owners. They show where technical interviews happen and are not customers, partners or endorsements.

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