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ScreenMark VS useEffect.dev

Compare ScreenMark VS useEffect.dev and see what are their differences

ScreenMark

A macOS menu bar app for live screen annotation, zoom, whiteboard, freeze frame, and recording — plus a free iPhone remote companion.

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0 reviews
Alternatives Is it good?
useEffect.dev

Interactive course to learn and master React Hooks

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0 reviews
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ScreenSnap Pro
Stop sharing plain, boring screenshots. Add stunning backgrounds, pro annotations, and instant cloud links — all in one click. Pay once, own it forever. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Base details

Website, pricing, platforms and company facts side by side.

ScreenMark
useEffect.dev
Website ceritmustafa.github.io useeffect.dev
Pricing —
Official pricing
Platforms
MacOS iOS
—
Listed in
Digital Whiteboard Screen Recording Screenshot Annotation Menu Bar Apps Mac Tools +2
JavaScript Online Courses React

Features and specs

What each product offers, as listed by its team.

ScreenMark 11 features
useEffect.dev 5 features
  • Annotation Tools
    Pen, arrows, shapes, highlighter, blur, spotlight and eraser with S/M/L/XL stroke sizes, plus rich text in 5 font families and 9 weights with alignment and background highlight — drawn straight over any app.
  • Live Zoom
    Three modes — follow lens, full screen and cursor focus — magnifying the screen in real time while the app underneath stays fully interactive.
  • Whiteboard & Blackboard
    Full-screen blank surfaces you can switch to mid-session with one shortcut, with the annotation toolset available on top.
  • Cursor Highlight & Flashlight
    Spotlight the pointer with a coloured ring in circle, squircle or rhombus, or dim the entire screen except a soft circle around the cursor. Adjustable radius and edge softness; hides when idle.
  • Screen Recording
    Records to MP4 with system audio and microphone mixed in real time.
  • Freeze Frame & Snip
    Pause the display on any moment and annotate the frozen frame, or drag to snip a region and send it to the clipboard or disk.
  • Break Timer
    Full-screen countdown with a three-ring hours/minutes/seconds display, background presets, system clock overlay and audio alerts.
  • iPhone Remote Control
    A free companion iPhone app turns your phone into a remote for the Mac overlay: cursor highlight, flashlight, drawing, zoom and slide navigation for Keynote, PowerPoint and Preview. Pairs over local Wi-Fi with a four-digit code — no account, no cables.
  • Custom Keyboard Shortcuts
    Every tool is individually assignable to its own shortcut, editable in Settings and resettable to defaults.
  • Languages Supported
    20 — English, Turkish, German, French, Spanish, Italian, Japanese, Korean, Chinese (Simplified & Traditional), Portuguese, Russian, Ukrainian, Polish, Dutch, Slovak, Vietnamese, Hindi, Arabic and Persian.
  • Privacy
    Runs entirely on device. No account, no servers, no analytics, nothing uploaded. Fully sandboxed and distributed through the Mac App Store.
  • React-focused learning resource
    useEffect.dev is a specialized resource dedicated to helping developers understand and master React's useEffect hook, one of the most commonly used but often misunderstood hooks in the React ecosystem.
  • Practical examples
    The site provides practical, real-world examples of useEffect usage patterns, making it easier for developers to learn how to properly implement side effects in their React components.
  • Niche expertise
    By focusing specifically on useEffect, the resource can go deep into edge cases, best practices, and common pitfalls that more general React tutorials might gloss over.
  • Accessible for beginners
    The site is designed to be approachable for developers who are new to React hooks, providing clear explanations that help bridge the gap between class component lifecycle methods and the hooks paradigm.
  • Free online resource
    As a web-based resource, it is freely accessible to anyone with an internet connection, lowering the barrier to learning about React's useEffect hook.

Possible disadvantages

  • Narrow scope
    The site is extremely focused on a single React hook, which limits its usefulness as a comprehensive learning resource for React development as a whole.
  • Limited community and recognition
    useEffect.dev is not a widely known or heavily trafficked resource compared to the official React documentation or popular platforms like freeCodeCamp or Egghead, which may mean less community support and fewer peer-reviewed contributions.
  • Potential for outdated content
    As React evolves rapidly (e.g., the shift toward React Server Components and away from useEffect in some patterns), the content may become outdated if not regularly maintained and updated.
  • May not cover advanced patterns sufficiently
    While useful for understanding useEffect basics, the resource may not fully cover more advanced state management patterns or alternatives like useQuery, useSWR, or other libraries that abstract away direct useEffect usage.
  • Lack of interactive features
    Compared to platforms with interactive coding environments, sandboxes, or exercises, the site may offer a more passive learning experience that doesn't fully engage developers in hands-on practice.

Analysis

An editorial look at what each product does well and who it suits.

ScreenMark
useEffect.dev

No analysis of ScreenMark yet.

Overall verdict

  • useEffect.dev appears to be a niche educational resource focused on React's useEffect hook and related hooks concepts, useful for developers who want targeted explanations and examples rather than a full-scale course platform.

Why this product is good

  • Focuses specifically on a commonly confusing React concept, which can save time compared to searching broader documentation
  • Likely provides practical code examples that clarify real-world usage patterns
  • Can serve as a quick reference for debugging common useEffect pitfalls like dependency arrays and cleanup functions
  • Being narrowly scoped, it may be easier to digest than lengthy general React courses

Recommended for

  • Junior to mid-level React developers seeking clarity on useEffect specifically
  • Developers debugging issues related to effect dependencies or infinite render loops
  • Self-taught programmers who prefer concise, topic-specific resources over full courses
  • Teams looking for a quick reference link to share with newer developers on the team

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
ScreenMark
useEffect.dev
100% 100%
Screenshot Annotation
0% 0%
0% 0%
JavaScript
100% 100%
100% 100%
Screen Recording
0% 0%
0% 0%
Online Courses
100% 100%

Questions & Answers

As answered by people managing ScreenMark and useEffect.dev.

What makes your product unique?

ScreenMark's answer

Two things.

First, the iPhone remote. ScreenMark ships a free companion app that turns your phone into a physical remote for the Mac overlay — cursor highlight, flashlight, drawing, zoom, and slide navigation through Keynote, PowerPoint and Preview. It pairs peer-to-peer over your local network with a four-digit confirmation, no account and no cables. Every other screen annotation tool on the Mac assumes you are sitting at the keyboard. This one follows you when you walk to the screen.

Second, it covers the whole session rather than one slice of it. Annotation, live zoom, freeze frame, snip, whiteboard and blackboard, a full-screen break timer, and MP4 recording with system audio and microphone all live behind a single menu bar icon. Competing tools each own one of those jobs, so people end up stacking three utilities to run one presentation.

It is also local-first by design: no account, no servers, no analytics, nothing uploaded, fully sandboxed.

Why should a person choose your product over its competitors?

ScreenMark's answer

The direct alternatives on macOS are Presentify, Scribbble, Presenter Pointer, Annotate, DemoPro and IPEVO Annotator; on Windows, Epic Pen and ZoomIt.

Against all of them ScreenMark adds two capabilities none of them have: control from your iPhone, and built-in screen recording with system audio and microphone mixed live, annotations included. If you present remotely or record training material, that removes a second app from your workflow.

It is also the only one in the category localised into 20 languages. The people who buy annotation tools — teachers, lecturers and trainers — are overwhelmingly outside the English-speaking world, and every significant competitor ships English-only.

On price: Pro is $29.99 once, or $19.99 a year. The category leader is $14.99 one-time for a smaller feature set, and the tools that do offer recording are typically subscription-only at a much higher tier. There is a genuinely usable free tier, and a 7-day trial on the subscriptions.

How would you describe the primary audience of your product?

ScreenMark's answer

Teachers, lecturers and corporate trainers first — anyone who explains something on a screen to a room or a call, repeatedly, as part of their job. They are the group that needs zoom, whiteboard, break timer and recording in one place, and they are the reason the app is localised into 20 languages.

Second are software people running demos: sales engineers, product managers and developers walking a client or a team through an interface. For them the draw-and-zoom-over-any-app behaviour matters more than the teaching features.

Third are content creators recording tutorials, who use the annotation and recording together.

Across all three the common thread is that the work happens live, in front of other people, and switching apps mid-explanation breaks the room. That constraint shaped the whole product — one menu bar icon, keyboard shortcuts for everything, and a phone remote for when you are not at the desk.

What's the story behind your product?

ScreenMark's answer

The thing that kept me building was realising the problem was not "I need a pen tool." Presenting on a Mac, I kept doing the same thing: talking about something on screen while waving the cursor at it and hoping people were looking in the right place. Plenty of tools solve the drawing. None of them solved the fact that the person presenting is not sitting still.

That is why the iPhone remote exists, and it is the feature I now use most. Once you can trigger highlight, zoom and drawing from your hand, you can walk to the screen and still drive it.

The rest followed from the same observation. Freeze frame, whiteboard, break timer and recording are not separate utilities — they are the parts of running a session. So they all went behind one menu bar icon.

The macOS app shipped in April 2026, the iPhone companion in June, and it has been localised into 20 languages since.

Which are the primary technologies used for building your product?

ScreenMark's answer

Built entirely with native Apple frameworks and Swift — no third-party SDKs or dependencies anywhere in the project.

The macOS app is SwiftUI and AppKit, using ScreenCaptureKit for everything that touches the screen: live zoom, freeze frame, snip and recording. Purchases run through StoreKit. The iPhone companion is SwiftUI, and the two apps connect directly to each other over the local network — peer-to-peer, with no server in between, so nothing leaves the two devices.

Universal binary for Apple Silicon and Intel, fully sandboxed, distributed through the Mac App Store.

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