Reaction
Behaves like a person
NewA behavior engine varies speed, timing and pauses the way a person does, so the activity looks genuine rather than automated.
Behavior
How Reaction behaves at your computer
A behavioral engine instead of a timer, a dedicated scenario for each of 50+ apps, and an instant pause from the keyboard — everything that makes the activity look alive rather than robotic.
Features
More than a mouse jiggler: human behavior, not a robotic loop
Reaction does not jiggle your mouse on a timer. It models the behavior of a real person, so every action looks natural instead of a robotic pattern.
Human-like mouse
Smooth cubic-bezier cursor paths with micro-pauses and a natural return — never a robotic teleport across the screen.
Natural keystrokes
Uneven speed, pauses between keys and only safe navigation keys — arrows and page keys, never your documents.
Scroll, click and windows
Occasionally scrolls, clicks and switches windows so the screen keeps changing naturally.
Hidden mode
Runs with no window and no tray icon for a clean, out-of-the-way setup. Optionally rename the process and swap its icon.
Autostart and your band
Launches with your OS and holds the activity level you choose, with natural pauses — any range, not fixed percentages.
App scenarios
A hand-crafted scenario for 50+ apps
When the simulator switches into a window it knows, it runs a scenario written specifically for that app — tabs, panels, scrolling. Every other window gets the universal scenario.
Tabs
Cycles browser and editor tabs back and forth — never a robotic jump.
Sheets, pages and slides
Switches spreadsheet sheets, document pages and presentation slides.
Panels and tools
Collapses and expands sidebars, toggles tools and app sections.
Content scrolling
Scrolls code, pages and playlists at a human pace.
Safe actions only
Every shortcut is verified against the vendor's documentation: nothing gets typed into your files.
The frame always changes
Every action produces a visible change on screen, so the view keeps changing naturally.
Apps with a dedicated scenario
Browsers Google Chrome Microsoft Edge Firefox Safari Brave Opera Opera GX Vivaldi Yandex Browser Zen Browser Chromium + more
Editors, IDEs and dev tools VS Code Cursor Windsurf VSCodium IntelliJ IDEA PhpStorm WebStorm PyCharm GoLand CLion RubyMine DataGrip Rider Android Studio Visual Studio Sublime Text Notepad++ Eclipse DBeaver Tableau + more
Office and mail Excel Word PowerPoint Keynote LibreOffice Calc LibreOffice Impress Outlook Thunderbird OneNote + more
Design and notes Figma Notion Obsidian Postman + more
PDF and media Adobe Acrobat Foxit Reader Sumatra PDF PDF-XChange Spotify VLC + more
Your app is not on the list? Any other window is covered by the universal scenario: scrolling and safe navigation keys.
Hotkeys
Instant control
Global hotkeys work even in hidden mode. On macOS, use Cmd instead of Ctrl.
- Pause / resume simulation
- Ctrl 1
- Show the app window
- Ctrl 2
FAQ
Questions, answered
What people ask before installing Reaction: detection, trackers, support and pricing.
Why should I use Reaction?
Reaction stops a tracker from marking you "idle" while you are away. It behaves like a real person at the keyboard — moving the mouse, typing and reacting to the screen — so your reports show a steady working session.
Does Reaction run quietly in the background?
Yes. In hidden mode it runs with no window and no tray icon, so it stays out of your way. You can optionally rename the process and set a custom icon to keep your app list tidy.
How does it keep me from showing as idle?
Trackers measure activity from keyboard and mouse input and take screenshots. Reaction feeds them the exact signal a person produces: varied speed, natural pauses and smooth motion — so your session reads as genuine, ongoing work.
Which time trackers does Reaction work with?
We have tested Reaction with every popular tracker — Time Doctor, Hubstaff, ActivTrak, Upwork, Insightful, Teramind, DeskTime and many more. The full list is in the "Supported trackers" section.
Does Reaction track anything?
No. Reaction does not upload or collect any data from your computer. The only network call it makes is to check that your license key is valid.
How is this better than a physical mouse jiggler or jiggler software?
Trackers have learned to spot random mouse twitches and clicks fired on a timer. Reaction does not jiggle the cursor — it models human behavior, so the activity looks genuine rather than robotic. And it is an app, not a USB dongle: nothing to buy or plug in.
What happens if I come back while Reaction is running?
Reaction only simulates activity while the machine is idle. The moment you move the mouse or press a key it pauses instantly and hands control back to you. Resume with the same hotkey.
Does Reaction slow down my computer?
No. Reaction is a lightweight app that barely touches your system and runs quietly in the background. You will not notice a difference in speed.
How fast is support?
We are always on. Message us anytime — we usually reply within hours and help with install and tuning for your tracker. There is a real team on the other end, not an autoresponder.
Which operating systems are supported, and do I need to install it?
Reaction is a desktop app for Windows, macOS and Linux (Linux is still in beta), with a signed installer per platform. macOS ships a notarized build for Apple silicon and Intel; you grant Accessibility permission on first launch. A portable build is on the roadmap.
How much is it, and what happens after the free trial?
There is a 14-day free trial with a card. After that it is $7/month or $50/year — the single Reaction All plan with every feature included. Cancel anytime.
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