Softwr

Browser Extensions · head to head

React Developer Tools vs Stay

React Developer Tools logo

React Developer Tools

Browser Extensions

Debug React applications in your browser

From
Free
Rated
-
Full reviewWebsite
Stay logo

Stay

Browser Extensions

Safari userscript manager that runs Tampermonkey scripts

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: React Developer Tools react Developer Tools is only available as a Chrome browser extension. No support for other browsers mentioned.; Stay apple only. No Chrome, Firefox or Edge build, so it cannot serve a cross-browser workflow.
  • They diverge on capability: React Developer Tools covers Component inspection, Stay covers Tampermonkey and Violentmonkey compatibility.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which React Developer Tools and Stay actually diverge.

Attributes where React Developer Tools and Stay differ
AttributeReact Developer ToolsStay
Pricing modelfreeone-time
PlatformsChrome, Firefox, EdgeSafari, iOS, macOS
Founded2004Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Browser Extensions).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in React Developer Tools

  • Component inspection
  • Props/State viewing
  • Performance profiler
  • Hooks debugging
  • Chrome support
  • Firefox support
  • Edge support

Only in Stay

  • Tampermonkey and Violentmonkey compatibility
  • Userscript management
  • Cross-device bookmark sync
  • Download manager
  • Dark mode
  • One-time purchase across platforms

What people use each for

The jobs each tool is most often brought in to do.

React Developer Tools

  • Debugging React components during developmentnot Stay
  • Inspecting component state and propsnot Stay
  • Performance profiling of React applicationsnot Stay

Stay

  • Running Tampermonkey scripts on Safarinot React Developer Tools
  • Running userscripts on iPhone and iPadnot React Developer Tools
  • Syncing bookmarks across Apple and non-Apple devicesnot React Developer Tools
  • Managing downloads into categorised folders on iOSnot React Developer Tools
  • Forcing dark mode on sites that do not offer itnot React Developer Tools

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

React Developer Tools

  • React Developer Tools is only available as a Chrome browser extension. No support for other browsers mentioned.

Stay

  • Apple only. No Chrome, Firefox or Edge build, so it cannot serve a cross-browser workflow.
  • The free tier is deliberately limited, so the practical product is the paid one.
  • Compatibility with Tampermonkey and Violentmonkey scripts is a translation layer rather than the real thing, and a script relying on an unusual GM function may not behave identically.
  • It bundles bookmark sync, downloads and dark mode alongside the script manager, which is more surface area than some people want from an extension with access to every page.
  • A much smaller project than the established managers, so fewer scripts are tested against it.

Pricing, plan by plan

React Developer Tools

Free
  • FreeFree
    • Component tree
    • Props inspection
    • State tracking

Stay

Free
  • FreeFree
    • Limited functionality
  • Lifetime$5/one-time
    • All features
    • iPhone, iPad and Mac
    • Lifetime updates

Which should you pick?

Choose React Developer Tools if

  • You need component inspection.
  • You want to start without paying.
  • You work on Chrome, Firefox, Edge.
  • You also want props/state viewing.
React Developer Tools review

Choose Stay if

  • You need tampermonkey and violentmonkey compatibility.
  • You want to start without paying.
  • You work on Safari, iOS, macOS.
  • You also want userscript management.
Stay review

Questions people ask

Is React Developer Tools or Stay better?
Neither clearly leads. React Developer Tools starts at Free and Stay at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, React Developer Tools or Stay?
React Developer Tools starts at Free and Stay at Free.
Does React Developer Tools or Stay run on more platforms?
React Developer Tools runs on Chrome, Firefox, Edge. Stay runs on Safari, iOS, macOS.
Can I use React Developer Tools for free?
Both have a free tier, so you can try either at no cost before committing.
What is React Developer Tools best used for?
React Developer Tools is most often used for debugging react components during development, inspecting component state and props, performance profiling of react applications. Of those, debugging react components during development and inspecting component state and props are not what Stay is typically brought in for.
What can React Developer Tools do that Stay cannot?
React Developer Tools covers Component inspection, Props/State viewing, Performance profiler, Hooks debugging. Stay covers Tampermonkey and Violentmonkey compatibility, Userscript management, Cross-device bookmark sync, Download manager.

Answered from the vendors’ own pages

React Developer Tools: How much does React Developer Tools cost?

React Developer Tools is completely free. It is a free browser extension with no subscription fees or costs.

Source
Stay: Can Stay run Tampermonkey scripts?

Yes. It supports its own native scripts and also scripts written for Tampermonkey and Violentmonkey, which is the main reason to choose it on Safari.

Source
React Developer Tools: Is React Developer Tools available for download?

Yes. React Developer Tools is available as a free extension on the Chrome Web Store for download at no cost.

Source
Stay: How much does Stay cost?

A one-time payment, reported at around $5, covering iPhone, iPad and Mac with lifetime updates and no subscription. A free version with limited functionality is available.

Source
Stay: Does Stay work on iPhone?

Yes. It supports Safari across iPhone, iPad and Mac, and the single purchase covers all three.

Source
Stay: What can userscripts do in Safari through Stay?

The vendor's examples are automatic pagination, immersive translation, redirect blocking and aggregated search. Anything a userscript can do on another browser is broadly in scope, subject to Safari's own restrictions.

Source
Stay: Is Stay open source?

The project publishes source on GitHub, and the app is distributed through the App Store as a paid product with a limited free tier.

Source
Share

Related pages

More on React Developer Tools

More on Stay

Keep looking

Other head to heads