The Responsively App Insider’s Guide
Everything we know about Responsively App in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Responsively App
The Insider’s Guide
Free open source browser that shows many device sizes at once
Every plan, grade, refund rule and rival among browsers, read from Responsively App’s own pages.
Made by Responsively App · checked Nov 13, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Responsively App’s own pages, its app-store listings and our grades. Every fact in it is on Responsively App’s page too, where it is kept up to date. Checked Nov 13, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
3.0
GPA, above 34 of the 60 other browsers we grade
Responsively App is a desktop browser for web developers that previews a site on many device sizes side by side, mirroring clicks, scrolls and navigation across them. It is built with Electron, is open source under the AGPL-3.0 license, and is free to download for Mac, Windows and Linux.
To get you started, here are 8 things to know about Responsively App, taken from its own pages and our grades.
It uses Chromium, so it will not show you Safari or Firefox behaviour.
- 1
Best for previewing a site on many screen sizes at once
Responsively App is a free open source browser that shows your site on many device sizes at once and mirrors your clicks across them.
- 2
It is free
Responsively App has no paid plan at all. The whole app is free; its site and GitHub page list no paid plans.
- 3
It runs on 3 platforms
macOS, Windows and Linux.
- 4
All devices at once
Many device previews show side by side, so there is no need to resize the dev tools window.
- 5
Mirrored interactions
A click, scroll or navigation in one preview is repeated in all the others in real time.
- 6
Preview Suites
Favorite device combinations are saved as Preview Suites and switched between while testing.
- 7
A 3.0 GPA, above 34 of 60
That is against the other browsers we grade, on value, the free plan, features, ease of use and platforms.
- 8
Keep it
Responsively App is free, so making your own would save you nothing.
Responsively App at a glance
- Pricing
- Free
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- macOS, Windows, Linux
- Made by
- Responsively App
- Category
- Browsers
- Our grade
- 3.0 GPA, very good
The report card
Best for previewing a site on many screen sizes at once
Responsively App is a free open source browser that shows your site on many device sizes at once and mirrors your clicks across them. It uses Chromium, so it will not show you Safari or Firefox behaviour. It is for developers, not for everyday browsing.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | A | Free and open source, with no paid plans listed. |
| Free plan and trial | A | The whole app is free, with no paid plans listed on its site or GitHub page. |
| Features | C | Many device views, mirrored interactions, device profiles and screenshots. It does that job fully, but it is a smaller job than a full developer toolset. |
| Ease of use | B | No store rating on record. Install it, enter a URL and see the devices. |
| Platforms and integrations | C | Desktop only: macOS, Windows and Linux. No mobile app and no integrations listed. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who Responsively App is for
- Fits if you build responsive sites and want to check many screens at once
- Works for front-end developers who want a free tool, not a subscription
Who it is not for
- Not for you if you want a daily browser, as it is a developer tool
- Skip it if you need Safari or Firefox engines, because it previews with Chromium
- Watch out: it runs on Mac, Windows and Linux only, with no mobile version
- Too light for debugging, as it has no extra tools listed beyond an inspector and screenshots
Good to know
Good for
- Front-end developers checking breakpoints across devices
- Designers reviewing a page at several screen sizes
- Developers who want a free alternative to paid viewport tools
Worth knowing
- It is a developer tool, not a general-purpose daily browser.
- It is built on Electron, so it previews sites with Chromium rather than Safari or Firefox engines.
- It runs on Mac, Windows and Linux only, with no mobile version.
- A beta channel is offered next to the stable release.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
Free
No paid plan at all
Responsively App is free to use.
Free and open source, with no paid plans listed.
Free
$0
The full app, free and open source. The project takes sponsorships but sells no plans.
The free plan
The whole app is free; its site and GitHub page list no paid plans.
Read from responsively.app on Nov 13, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
3
Places it runs: macOS, Windows and Linux
Free open source browser that shows many device sizes at once. Here is what it does, as its own site describes it, and what it covers: open source, screenshots, web browser.
Many device views, mirrored interactions, device profiles and screenshots.
- All devices at once
- Many device previews show side by side, so there is no need to resize the dev tools window.
- Mirrored interactions
- A click, scroll or navigation in one preview is repeated in all the others in real time.
- Preview Suites
- Favorite device combinations are saved as Preview Suites and switched between while testing.
- Device profiles
- A large collection of device profiles is built in, and custom devices can be added.
- Unified Inspector and screenshots
- One inspector covers every device, and full-page screenshots of all devices are taken in one click.
- Ordinary browser features
- Cookie, local storage and session storage management, bookmarks and the usual dev tools are included.
Where it runs
- macOS
- Windows
- Linux
What it works with
Its own pages name no integrations.
Responsively App is made by Responsively App.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
34/60
Other browsers it is graded above
Responsively App's GPA of 3.0 is higher than 34 of the 60 other browsers we grade, and level with 9.
It stands best on value for money (A, above 22 of 60) and worst on features (C, above 2).
Responsively App has no paid plan.
On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 61 browsers we grade, cut by the letter each got. Responsively App’s own letter is outlined.
- AValue for moneyAbove 22 of 60
- AFree plan and trialAbove 21 of 60
- CFeaturesAbove 2 of 60
- BEase of useAbove 28 of 60
- CPlatforms and integrationsAbove 4 of 60
Price against what you get
Each dot is one of 54 browsers. Further left costs less; higher up scores better on features, ease of use and platforms. Responsively App is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
Responsively App is free, so making your own would save you nothing.
And it is not the kind of software a weekend replaces.
What you could not
- A web browser.
- Capture tools hooked into the operating system.
- Apps for macOS, Windows and Linux that stay in step with each other.
What this rests on. Responsively App’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Polypane, Sizzy and Blisk
The 3 tools Responsively App is most often weighed against, with where each one differs from it.
- 2.0GPA
Polypane
Free trial · from $9/mo
Chromium-based browser for web developers, with synced viewports.
- Responsively App has a free plan. Polypane does not, though it has a free trial.
- Responsively App is open source, according to its own site.
- Responsively App also covers screenshots.
- 1.6GPA
Sizzy
From $12/mo
Chromium browser for developers with synced device previews.
- Responsively App has a free plan. Sizzy does not.
- Responsively App is open source, according to its own site.
- Sizzy can be bought with a one-time purchase.
- 2.0GPA
Blisk
Free plan · from $11.99/mo
Developer browser for testing sites on many devices at once.
- Responsively App is open source, according to its own site.
- Blisk also covers screen recording.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
11
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Responsively App free?
Yes. Responsively App is free to use.
How much does Responsively App cost?
Responsively App lists one plan. Free: $0.
What platforms does Responsively App work on?
Responsively App is available on macOS, Windows and Linux.
Does Responsively App have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Responsively App is listed for macOS, Windows and Linux.
Does Responsively App have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Responsively App is listed for macOS, Windows and Linux.
Is Responsively App open source?
Yes. Responsively App is open source, according to its own site.
Who makes Responsively App?
Responsively App is made by a company of the same name.
What are the alternatives to Responsively App?
The closest alternatives to Responsively App in our directory are Polypane, Sizzy and Blisk.
How does Responsively App compare with other browsers?
Responsively App's GPA of 3.0 is higher than 34 of the 60 other browsers we grade, and level with 9.
Is Responsively App good value for money?
ToolGPA grades Responsively App A for value for money. Responsively App has no paid plan.
Could I make my own version of Responsively App?
Responsively App is free, so making your own would save you nothing. And it is not the kind of software a weekend replaces.
Where this guide comes from
The prices, plans, platforms and features were read from Responsively App’s own pages on Nov 13, 2026, and the grades were given on Nov 13, 2026. Graded from this listing, whose facts were read from Responsively App's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Responsively App. Prices change, so check responsively.app before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
7,721
Tools graded, in 95 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
7,721
tools graded
95
categories
739
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Responsively App, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/responsively-app
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Responsively App: The Insider's Guide", checked Nov 13, 2026. https://toolgpa.com/tools/responsively-app
Know someone choosing between browsers?
Send them this guide: toolgpa.com/tools/responsively-app/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded browsers after Responsively App, each with an Insider's Guide of its own.
- Browsers Insider's GuideEvery one of the 61 browsers we grade, compared
- Brave Insider's GuideOpen-source browser that blocks ads and trackers by default3.8 GPA
- Firefox Insider's GuideFree, open-source browser from Mozilla with tracker blocking built in3.8 GPA
- Vivaldi Insider's GuideCustomizable browser with built-in mail, calendar and feed reader3.8 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Responsively App’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Responsively App is a trademark of its owner, and this guide is not made, paid for or approved by Responsively App. Prices and plans change: check responsively.app before you buy.