Available on the Mac App Store

The iOS Simulator
toolkit for Mac

HTTPS proxy with mocking and throttling, real push to devices, and AI agents driving the Simulator over MCP. One native Mac app, no SDK needed.

Replace xcrun simctl with a GUI
Download for macOSExplore Features

Free tier available · macOS 14.7+ · Requires Xcode

CosmoKit, the iOS Simulator toolkit for Mac, with its deep links and camera capture panels docked beside the iOS Simulator

Features

Everything you need, one panel

Replace dozens of xcrun simctl commands with an intuitive interface.

Works with your AI agent

Run cosmokit mcp and any MCP client, such as Claude Code or Cursor, discovers 56 simulator tools it can call with typed arguments: install and launch apps, capture screenshots and video, replay GPS routes, send push payloads, flip permissions, trust a debugging certificate, and read UserDefaults and logs. The agent can read the screen and tap (ui tree / ui tap) and you can watch in the browser. Every command also takes --json, so an agent that only runs shell still gets a structured result to parse instead of prose.

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cosmokit CLI

The same simulator operations from the terminal, for Makefiles, git hooks and CI. Free, open source, and it runs without the app.

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Network Proxy

Inspect requests, introduce delays, simulate failures, and validate edge cases with a built-in proxy workflow.

Network Proxy
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Deep Links

Store reusable URL schemes and universal links so common app flows stay one click away during debugging.

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Push Payload Testing

Queue test notifications, preview how they render on-device, and verify custom payload data before shipping.

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Locations and Routes

Build route presets, replay movement, and coordinate changes across your simulator tests without leaving the panel.

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App Profiles

Every app keeps its own setup: its bundle ID, its simulators, and the deep links, pushes and locations that belong to it. Switch app, switch everything.

App Profiles
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UserDefaults Editor

Read the app's live defaults, flip a flag, rewrite an array or delete a key, then restart the app from the panel.

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Screen Capture

Grab clean screenshots from the selected simulator and keep capture settings close to the rest of your testing workflow.

Screen Capture
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Scheme Diagnostics

Zombies, Main Thread Checker, Core Data SQL logging and 8 more Xcode diagnostics — attached to a profile, not a scheme. Turn them on once, run them every time.

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Recording

Record simulator sessions without jumping through Terminal commands, then save the result right from the same workspace.

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Menu Bar

Capture the booted simulator from any app with ⌃⌥⌘S, without switching windows. The menu bar also keeps your last five captures one click away, boots the simulator you used last, and re-sends your most recent push payload.

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App Store Screenshots

Render your captures at the exact sizes the App Store requires, for iPhone, iPad and Mac, without opening a design tool.

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Multiple Simulators

Run and control more than one simulator from the same workspace while keeping runtime tools, appearance, and app controls close by.

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Appearance

Flip simulator appearance and related UI settings while you test states side by side.

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Status Bar

Adjust simulator presentation details like status bar output when a test or capture needs a cleaner frame.

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Permissions

Reset and manage app permissions (camera, location, notifications) without reinstalling.

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Face ID

Simulate enrollment, match, and mismatch for biometric authentication testing.

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Keychain

Browse and manage keychain items stored by your app in the simulator.

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Dev Presets

Restore a whole working setup in one click instead of rebuilding it by hand every morning.

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Disk Doctor

See exactly where your simulator storage went and reclaim the tens of gigabytes old runtimes leave behind.

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Paired Devices

A read-only panel listing the iPhones and iPads paired with your Mac, with model, iOS version and connection state.

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Pricing

Simple, transparent pricing

Start free, upgrade when you need more. All plans include every future update.

Free is yours forever: one simulator at a time, watermarked captures, a few proxy sessions to try it, and up to 5 saved push payloads, deep links and locations. Pro comes with every paid plan and lifts those limits: multiple simulators, no watermark, the network proxy with no session cap, route simulation and unlimited app profiles.

Free

Essential tools to get started

$0
  • 1 simulator
  • Screenshot capture (with watermark)
  • Video recording (with watermark)
  • Push notifications
  • Deep links
  • GPS location simulation
  • 5 saved entries per tool
  • Simulator tools (appearance, status bar, permissions, Face ID, keychain)
  • 1 app profile
Download Free

Monthly

14-day free trial, then $2.99/mo

$2.99/mo
  • Unlimited simulators
  • Screenshots without watermark
  • Video recording without watermark
  • Device frames & bezels
  • Custom frame colors
  • Audio recording
  • Touch indicators
  • Custom aspect ratio
  • Network proxy
  • App management tools
  • Location routes
  • Unlimited saved entries
  • Unlimited app profiles
Start Monthly
Save 44%

Yearly

Best value: save 44%

$19.99/yr
  • Unlimited simulators
  • Screenshots without watermark
  • Video recording without watermark
  • Device frames & bezels
  • Custom frame colors
  • Audio recording
  • Touch indicators
  • Custom aspect ratio
  • Network proxy
  • App management tools
  • Location routes
  • Unlimited saved entries
  • Unlimited app profiles
Start Yearly
Best Deal

Lifetime

Pay once, own it forever

$69.99once
  • Unlimited simulators
  • Screenshots without watermark
  • Video recording without watermark
  • Device frames & bezels
  • Custom frame colors
  • Audio recording
  • Touch indicators
  • Custom aspect ratio
  • Network proxy
  • App management tools
  • Location routes
  • Unlimited saved entries
  • Unlimited app profiles
Buy Lifetime

All plans are managed through the Mac App Store. Cancel or switch anytime.

Ready to streamline
your workflow?

Download CosmoKit from the Mac App Store and take full control of your iOS Simulator.

Download for macOS
Proxy Helper (optional)

Optional .pkg: only needed if you want CosmoKit to set up the macOS proxy for the HTTPS proxy in one click.

Optional CosmoKit Proxy Helper

Install this signed helper to let CosmoKit configure macOS HTTP/HTTPS proxy settings in one click. Subscriptions and Pro access stay inside the Mac App Store app.

cosmokit CLI

Scriptable access to the same simulator operations, for Makefiles, git hooks and CI, plus a built-in MCP server so an AI coding agent can discover and call them directly. Free and MIT licensed, runs without the app, and the CLI alone supports macOS 13 or later (the app itself needs macOS 14.7).

View on GitHub
macOS 14.7+Free tier availableNo account required

FAQ

Frequently asked questions

Everything you need to know about CosmoKit.

CosmoKit is a native macOS app that provides a unified control panel for the iOS Simulator. It replaces dozens of terminal commands (xcrun simctl) with an intuitive graphical interface: screenshot capture, video recording, push notifications, deep links, GPS simulation, network proxy, app management, and more.

CosmoKit requires macOS 14.7 (Sonoma) or later and Xcode installed on your Mac. It works with all iOS Simulator runtimes supported by your Xcode version.

The free tier includes screenshot and video capture (with watermark), push notifications, deep link testing, GPS location simulation, the simulator tools (appearance, status bar, permissions, Face ID, keychain), the UserDefaults editor, 1 app profile, and 5 saved entries per tool. It supports one simulator at a time.

Pro removes all watermarks, unlocks unlimited simulators and unlimited app profiles, adds device frames and bezels for screenshots, audio recording, touch indicators, custom aspect ratios, network proxy, full app management tools, App Store screenshot generation, location routes, and unlimited saved entries.

All subscriptions are managed through the Mac App Store. You can choose monthly ($2.99/mo, 14-day free trial), yearly ($19.99/yr, save 44%), or a one-time lifetime purchase ($69.99). You can cancel or switch plans anytime through your Apple ID settings. Prices vary by region. The final price is shown in the Mac App Store.

Yes, CosmoKit is distributed through the Mac App Store and runs in a sandboxed environment. It communicates with the iOS Simulator through approved system APIs and xcrun simctl commands.

CosmoKit's tools target the iOS Simulator. Since 4.6 it also shows a read-only Devices panel listing the iPhones and iPads paired with your Mac, with model, iOS version and connection state. Capture, GPS, push and the other tools remain simulator-only.

You can reach us at contato@usecosmoskittool.com or through the in-app feedback option. We actively respond to all support requests and feature suggestions.
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