You're now subscribed

Check your email to confirm your subscription—don’t forget to check your spam folder too!

Written logo spelling: "RocketSim"

The iOS Simulator companion for developers and AI coding agents.

RocketSim lets you inspect, test, and debug your app in the Simulator — without breaking your flow in Xcode, Codex, or Cursor.

RocketSim app icon
"4.8 Rating" badge from the Apple App Store, with five gold stars and a laurel wreath. "Essential Apps for Developers" Apple Featured badge with a laurel wreath.

25,000+ developers 250+ teams

Used by iOS developers at

Calendly,
Strava,
Jetbrains,
Google
monday.com,
Oura,
Doist,
Stanford University,

Agentic iOS development

Let your AI coding agent see and control the Simulator

RocketSim ships a version-matched rocketsim CLI and Agent Skill so Cursor, Xcode, Claude, Codex, and other AI coding tools can inspect and interact with your running Simulator app.

  • Read compact visible-element summaries with fewer tokens per screen read
  • Tap, swipe, type, wait, and capture screenshots through the running RocketSim app
  • Use selector-based interactions instead of fragile coordinate-only taps
  • Validate setup with rocketsim doctor
  • Keep the CLI and Agent Skill in sync through app updates

Compared to a popular alternative in our July 2026 head-to-head benchmark, RocketSim produced over 99% less command output, had an approximately 96% lower byte-based context estimate, and completed the measured command work in 32% less total time. The context estimate is a reproducible proxy, not actual model-token or billing usage.

Read the Agentic Development docs.

Network Monitor

Inspect, summarize, and debug network traffic in realtime

Explore JSON responses, request headers, metrics, and connected app logs without setting up a proxy. Copy cURL requests, export privacy-redacted summaries, and generate prompt-ready debugging context for AI-assisted network reviews.

Learn more · Watch demo

Network Monitoring is made possible by Pulse, an open-source project created by Alex Grebenyuk.

Test on a physical iPhone or iPad

Bring repeatable app testing to real hardware without leaving your Mac.

  • Open saved deep links and Universal Links on a connected iPhone or iPad
  • Simulate coordinates and routes through Xcode 27
  • Test automatic system time-zone changes from simulated locations
  • Launch, relaunch, terminate, localize, or uninstall a recent device build

Learn more

Ready to Build Apps Faster?

Boost your productivity and streamline your workflow with our powerful Xcode Simulator tools. Developers report building, testing, and verifying apps up to 2x faster with RocketSim.

Download nowStart a 14-day Teams Trial

Network Speed Control

Simulate slow networking conditions like 3G, Edge, and 100% loss without affecting your Mac’s connectivity.

Watch demo

RocketSim panel that shows a dropdown for network speed control. A popup is shown that gives more information about the network speed control feature.

Simulator Airplane Mode

How does your app work without a connection? Only your Simulator app gets disconnected. You can still use your Mac’s connection to search Stack Overflow, use ChatGPT, or share your progress via Slack.

Simulator Camera

Test camera functionality without a physical device by streaming your macOS camera. Scan QR codes or capture assets. All plug & play, you can just use the same AVCapture APIs as normal.

Compare designs

Use overlays or slide comparisons to spot differences between the implementation and the design.

Pixel-perfect implementations of delivered designs. Add your designs in the compare tool and verify your implementation, right in the Simulator.

Grids

Use the grid overlay to perfectly align elements across the screen. Change the color and spacing to match your needs.

Use the grid overlay to perfectly align elements across the screen. Change the color and spacing to match your needs.

Rulers

Horizontal and vertical rulers give you precise control. Coordinates are shown in on-device pixels so you know exactly where elements are placed. Hold ⇧ Shift to show distances between the rulers.

Horizontal and vertical rulers give you precise control. Coordinates are shown in on-device pixels so you know exactly where elements are placed.

Slow Animations

Enable slow animations to optimize your animations for perfection.

Magnify for precision

Hold ⇧ Shift and move mouse or scroll wheel to magnify

Use the Color Picker and copy the value as SwiftUI Color, NSColor, or UIColor code.

User Defaults Editor

Edit Standard & Group User Defaults in realtime

Test how your app responds to User Defaults changes. Quickly switch states like User Defaults-driven experiments.

Watch demo

Quick Actions

Configurable actions for deep links, push notifications, locations, permissions, app lifecycle, and quick state resets.

  • Bundle Identifier based: actions automatically show up for recent builds
  • Test locations and deep links on Simulator or a physical iOS device
  • Launch, relaunch, localize, terminate, or uninstall physical-device builds
  • Use Reset Keychain to clear stubborn authentication state faster

Location Simulation

Single locations or driving and walking routes—on Simulator or a physical iOS device

Boost your development speed by saving and reusing custom simulated locations. Test precise coordinates, road routes, direct off-road paths, or scenarios like walking a golf course in the Simulator and—with Xcode 27—on a physical iPhone or iPad.

Learn more

RocketSim location simulation with single coordinates, driving routes, and walking routes.

Recent builds

Quick actions for recent builds keep repeatable tests close to the active Simulator or connected physical iOS device. Actions follow the selected app’s bundle identifier and target capabilities.

  • Launch, relaunch, terminate, or uninstall apps on physical devices
  • Relaunch with locale to test supported languages without changing device settings
  • Open saved deep links and simulate locations on Xcode 27 devices
  • On Simulator, travel the world and relaunch with any time zone
  • Grant, revoke, or reset permissions like photo and location access, allowing you to quicker test related implementations
  • Open common directories like your app’s documents folder.

Watch demo

Quick actions for your recent builds help you increase productivity. These action execute on a given target bundle identifier configured in RocketSim's settings.

Environment Overrides

Make your app accessible by using environment overrides like inverted colors or changing the dynamic type size.

Watch demo

Make your app accessible by using environment overrides like inverted colors or changing the dynamic type size.

Professional recordings & screenshots

Capture and polish MP4, GIF, or PNG output for demos, reviews, social posts, and App Store submissions.

  • Add device bezels, custom backgrounds, and ratios like 16:9 for polished marketing assets
  • Fine-tune screenshots and videos afterwards with the built-in Post Editor
  • Use Touch Attention Mode and multi-touch indicators to make demos easier to follow
  • Record smooth Simulator videos, including 120 FPS output for scrolling, animations, and transitions
  • Capture audio and connected physical-device footage when you need real-device output
  • Optimize for App Store Connect App Previews without manually fighting FFmpeg or export specs
Create professional recordings and screenshots with device bezels, touch indicators, and audio.

Floating windows for quick access

Stack multiple captures in floating windows and drag them into any destination.

  • Copy your capture to your clipboard and paste anywhere
  • Edit and trim your video to get the exact result you’re looking for
  • Store your captures in a configurable destination using the save action
All your simulator captures appear as floating windows on the side, stackable.

09:41 - A historical moment in time

Did you know all iPhones in Apple’s keynotes are set to 09:41?

  • Configure your Simulator’s status bar to match Apple’s keynote designs
  • Customize the status bar into charging mode or using the 5G network
Customize the Simulator Status Bar and use any time, battery status, and more

A RocketSim recording in action

Touches + Bezels = Professional Recording.

RocketSim’s touch-attention mode ensures your demo is easy to follow since a touch indicator will be constantly visible. The 16:9 aspect ratio makes it a beautiful video to share on socials.

The Power of Drag and Drop

App Store Connect. GitHub. Slack. Twitter. iMessage.

Drag your recorded MP4 or GIF into any destination. Use it as an App Store Preview video or share a visual representation inside GitHub issues and pull requests. Directly share what you’re working on in Slack or on Twitter.

VoiceOver Navigator

Visualize VoiceOver element order right on the Simulator

Testing VoiceOver used to mean grabbing a physical device, enabling VoiceOver, and swiping through your app to hear the order of elements. It works, but it pulls you out of your development flow — you’re constantly switching between Simulator and device, and the gesture-based navigation can feel slow when you’re iterating.

VoiceOver Navigator keeps you in the Simulator. It overlays numbered labels on each accessibility element in the same order VoiceOver would use, so you can see at a glance whether your reading order makes sense. You can:

  • Arrow up and down — move through elements in VoiceOver order
  • Arrow left and right — switch between rotor categories (like swiping on device)
  • Enter — activate the focused element (e.g. tap a button); the app navigates and the overlay updates
  • Search — find elements by name or type
  • Rotor — manually select which rotor category to use
  • Overlay — turn the numbered overlay on or off
  • Stay in flow — verify accessibility behavior without moving to a physical device

No device, no gestures, no context switch. You get a much quicker loop for checking VoiceOver behavior while you develop.

VoiceOver Navigator showing numbered accessibility elements overlaid on the Simulator, allowing you to verify reading order without a physical device.
For Teams

RocketSim Insights

Increase the productivity of your whole team

Keep track of Xcode Build Durations

Unlike Xcode, RocketSim will cache all your builds for months to follow. You'll be able to compare build times and get notified when compilation times increase.
RocketSim panel that shows an overview of build insights of a scheme in an app. It shows build counts and build durations split up in mutliple ways.
Learn more about Teams →

Team Insights

Build Apps Faster with your whole team

What's the build duration across the team? Does an M3 Max make a difference in terms of compilation time? With team insights, you'll be able to optimize productivity based on real build data

Explore Team Insights

Everything you need, right from the statusbar

RocketSim keeps things simple. Access all actions right from the statusbar, without any disturbing windows.

Trigger deeplinks

Directly launch universal links that you just copied or select one from your stored groups.

Recent builds

Grant, revoke, or reset permissions. Open common folders or edit user defaults.

RocketSim opened from the MacOS menu bar. It shows a dropdown with navigation towards: deeplinks, screen recordings, screen captures, recent builds, deleting derived data, permissions, sandbox user data and more.

Capture recordings & screenshots

Create MP4 and GIF recordings or capture a screenshot.

Using your active simulator

All actions perform in the visible Simulator, simple as that.

Stay ahead of what's new in RocketSim

Feature updates for iOS developers using the Simulator.

Get new RocketSim releases, beta invites, workflow improvements, and early-access announcements in your inbox.

Join Thousands Of Productive Developers

See what others say about RocketSim on Social media

Support and Feedback

If you'd like to report an issue or if you have any ideas or feedback you can open an issue on the RocketSim GitHub Repository.