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Responsive Checker - Mobile Simulator Pro

By muji.star657

Responsive check & mobile friendly test on 55+ device simulators. Side-by-side preview, screenshots & custom viewports.

View Chrome Web Store
Time on the storeUnder 6 monthsSee the exact launch date
Store users13As shown on the Chrome Web Store
Chrome Web Store ratingNot rated yetNo store ratings yet
Last store update26 Jul 2026Version 1.0.2, 2 months ago

How Responsive Checker - Mobile Simulator Pro is doing

Responsive Checker - Mobile Simulator Pro has been on the store for less than six months and is in the top half of Tools by users.

Time on the store
Under 6 months

A rough range. Members see the exact launch date.

Place in Tools
Top half

By store users, among the Tools extensions we track.

See the exact launch date and full history

Inside the extension

Responsive Checker - Mobile Simulator Pro developer product preview 1
Product image 1 of 5

Reviews

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Audience & ratings

See full audience and rating history

Users and ratings over time, growth in the last 30/90/365 days.

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Release history

See the release history

Every version, when it shipped and what access it added or removed.

See all with Plus · $19/mo

Competitors

Closest by name, description, category or topic.

Finding the closest competitors…

Permissions & access

Access levelHigh

Can read and change every website you visit.

What it’s allowed to do, not what it actually does. Not a safety rating.

Permissions 5

Sensitive2

  • Read and change data on every website<all_urls>
  • See the address and title of every open tabtabs

Standard3

  • Work on the tab you click it onactiveTab
  • Save its own settingsstorage
  • Block or redirect requests with set rulesdeclarativeNetRequest

Members also see when a new version asks for new access.

Website access All

  • All websites
Extension ID
geccfgdkakfnnibmnbgalmbocmicdebf
Package size
25.72KiB
Manifest
Version 3

The maker

muji.star657 has 14 listings on the store. Updates most of their listings often.

Listings
14
Combined store users
≈304
Store Featured
0
Updated in the last 90 days
12 of 14

Combined users can count the same person more than once. See all 14 listings

Ext Watch AI

Should you build
in this niche?

One research report for Responsive Checker - Mobile Simulator Pro: the takeaway, search demand, traffic, pricing, reviews, competitors and what to build. Every number shows its source and date. Anything we cannot verify is marked.

Takeaway & demand

A cited takeaway, plus Google search volumes for the niche

Traffic & domain

Website popularity rank, visits and domain authority, each with its source

Money & pricing

Plans and prices read from the maker’s website. No revenue guesses

Reviews

Top complaints, praise and recent issues, quoted from real reviews

Competitors & ranks

Where it ranks against the closest listings

Build opportunity

What to build, what an MVP must fix, and how to position it

Full research reports, with Ext Watch Plus.

Create your account to save your research. Reports come with Plus, Pro and Max.

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