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Written logo spelling: "RocketSim"

Build, test, and automate iOS apps faster in the Simulator

RocketSim gives iOS developers and AI coding agents a faster way to inspect, test, record, and debug apps in the Simulator without leaving their workflow.

Scroll down to explore all features ↓

"4.8 Rating" badge from the Apple App Store, with five gold stars. The badge is black with white text and a white Apple logo, surrounded by a laurel wreath. Text at the bottom reads "App Store Reviews." "Essential Apps for Developers" badge from the Apple App Store. The badge is black with white text and a white Apple logo, surrounded by a laurel wreath.

Try RocketSim Pro free for 14 days

Your productivity boost starts now.

Discover features that help you code, test, and ship faster than ever. No credit card required. Just tools that make you a faster iOS developer.

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

In RocketSim’s benchmark, the rs/1 agent protocol produced 2.7x lower estimated token usage, 9.7x fewer output bytes, and 4x fewer wrong taps overall.

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.

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 Deeplinks (Universal Links), Push Notifications, locations, permissions, and quick state resets.

  • Bundle Identifier based: actions automatically show up for recent builds
  • Quickly test Locations, Push Notifications, and Deeplinks
  • Use Reset Keychain to clear stubborn authentication state faster

Location Simulation

Single locations or automobile and walking routes: Test them right in the Simulator

Boost your development speed by saving and reusing custom simulated locations. Set precise coordinates to test road routes, direct off-road paths, or scenarios like walking a golf course.

Single locations or automobile and walking routes: Test them right in the Simulator.

Recent builds

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

  • Relaunch with locale to quickly test your app in any its supported languages. No simulator restart required!
  • Travel the world and relaunch with any timezone
  • 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.

Try RocketSim Pro free for 14 days

Your productivity boost starts now.

Discover features that help you code, test, and ship faster than ever. No credit card required. Just tools that make you a faster iOS developer.

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.