RocketSim for Xcode Simulator
30+ iOS Developer Utilities
Only for Mac
Free · In-App Purchases
Mac
Automate, inspect, and interact with the iOS Simulator from Al coding agents. Debug networking, capture polished demos, and ship faster with 30+ developer tools.
RocketSim enhances the Xcode Simulator for iOS and iPadOS development: boost productivity and streamline your workflow with capture, networking, build insights, and quick actions beside the Simulator. Developers report building, testing, and verifying apps up to 2x faster per RocketSim Developer Research.
Key Highlights
- Polish screenshots and App Store Connect preview videos: open captures in the editor from the floating thumbnail, then tune bezels, touches, backgrounds, metadata, trim, and GIF export with App Store Connect-friendly dimensions—ideal for Swift, SwiftUI, and UIKit demos
- Debug networking without proxy certificates: throttle or drop traffic, Airplane Mode for your running app only, and inspect traffic via RocketSim Connect; use Copy Summary when you need a redacted line to paste into Slack or an agent prompt
- Track local build time trends next to Xcode with Build Insights across versions
- Exercise universal links, APNs payloads, GPS and time zones, environment overrides, and a VoiceOver overlay with keyboard navigation from the side window
- Pro: Simulator framebuffer recording up to 120 fps for fluid motion
Feature Breakdown
Screenshots and Recordings
- Start from the Captures tab in the side window; after capture, refine in the editor before export
- Bezels, touch callouts, optional metadata, audio, trim, GIF conversion
- Pro: 120 fps framebuffer recording when supported
Networking
- Simulate slow or lossy networks without slowing your Mac
- Per-app Airplane Mode in the Simulator only
- Inspect requests and responses; metrics; cURL export; trace export; Copy Summary for redacted sharing
- Speed control and monitor share a dedicated Networking area in the side window for quicker discovery
Accessibility
- VoiceOver overlay with keyboard navigation for testing in the Simulator without juggling a device as often
- Environment overrides from the side window: Bold Text, Dark Mode, Dynamic Type, and more—without opening Settings.app
- Tinted Liquid Glass legibility live on iOS 26 simulators
Build Insights
- Build count and duration trends in the main and side windows
- Compare performance across Xcode versions your team runs
Quick Actions for Builds
- Clear Derived Data globally or for the current app
- Open common app folders without Finder archaeology
- Grant, revoke, or reset permissions without reinstall churn
Compare Designs
- Overlay Figma, Sketch, or Zeplin frames on live UI
- Slider mode for pixel-level SwiftUI and UIKit checks
Design Tools and Magnify
- Grids and rulers in on-screen points; slow animations for layout polish
- Pixel zoom with color sampling as code
Deeplinks and Push Notifications
- Fire universal links and push payloads with the debugger attached
- Actions from recent builds; clipboard URL history; shareable Quick Action groups
- Grid or list layout for long route or push lists
Location Simulation
- Routes or single-pin GPS; time zones from a chosen place; Maps and travel flows
User Defaults Editor
- Live-edit standard and App Group defaults—flags, debug toggles, plist-backed state
Simulator Camera
- Mac camera in Simulator for AVFoundation, QR, and Vision-style demos
Full Customization
- Menu bar access including Open GitHub Issues
- Shortcuts and floating windows matched to your workflow
Trusted by Developers Everywhere
RocketSim is used daily by thousands of developers and 200+ teams—including teams at Meta, Runkeeper, and MacWhisper—to ship iOS apps with less friction. It fits TestFlight, App Store Connect, the Apple Developer app, and everyday Xcode use.
Xcode® is a trademark of Apple Inc., registered in the U.S. and other countries.
Terms of use: https://www.rocketsim.app/terms/
¹ Based on RocketSim Developer Research of 2024
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
New:
- Accessibility: added a Color Filter control with grayscale and red-green, green-red, and blue-yellow color blindness filters and an adjustable intensity, plus a new Liquid Glass section with the Tinted toggle and an Opacity slider, including a reset button. The color filters and the opacity slider require Xcode 27 or later.
- Accessibility: added a StandBy toggle to show or hide StandBy on iPhone Simulators. Requires Xcode 27 or later.
- Accessibility side window: added an Audit tab that scores the current screen, groups findings by rule, highlights affected elements, and copies a focused fix prompt for your agent. The score reflects how many rules pass, with Great, Good, and Needs work bands, and highlighted elements follow the Simulator screen as they move. A new heuristic rule, `non_descriptive_label`, flags labels that look like filenames or identifiers.
Improved:
- Renamed the Accessibility side window tabs to the more compact Toggles and VoiceOver labels.
- The VoiceOver tab now lists only what VoiceOver users can reach. Controls inside a combined row are no longer listed or highlighted, and a new Actions rotor shows rows with custom actions. The Landmarks rotor is replaced by Containers.
- Accessibility audit: `parent_child_conflict` accepts controls exposed as custom actions and reports controls that a combined row hides from VoiceOver. New heuristic rules `heading_trait_missing` and `selected_state_missing` flag section titles without the heading trait and tab or segmented controls without a selected state. Rules about VoiceOver output now skip controls VoiceOver can't reach, while touch target and contrast rules still check them.
- CLI: `elements --agent` output adds `!actions|id|...` rows for elements that have custom actions. Every element, including the controls inside a combined row, stays tappable by id.
- The Accessibility side window now follows changes you make in the Simulator itself, such as switching Dark Mode or Increase Contrast, without polling. Requires Xcode 27 or later.
- Improved reliability of the Accessibility side window: Dark Mode, Dynamic Type, and the accessibility toggles now apply consistently, including on the iOS 27 Simulator. Bold Text, On/Off Labels, Inverted Colors, and Differentiate w/o Color are hidden on iOS 27 Simulators for now, and Button Shapes is now called Show Borders to match iOS.
Fixed:
- CLI: commands that take `--udid` (such as `screen`, `elements`, `interact`, `screenshot`, and `duo`) now find a Simulator that was cloned and booted with `xcrun simctl`, without opening it in Simulator.app.
- Fixed a rare crash when several CLI commands or overlays read accessibility information from multiple Simulators at the same time, for example while running parallel `rocketsim elements` or `rocketsim wait` commands.
- iPad Pro and iPad mini in Device Hub no longer report that Device Hub is in expanded mode, so Comparing, Touches, and VoiceOver Navigator work again.
The developer, SwiftLee, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SwiftLee
- Size
- 63 MB
- Category
- Developer Tools
- Compatibility
Requires macOS 15.2 or later.
- Mac
Requires macOS 15.2 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- RocketSim Yearly USD 49.99
- RocketSim Monthly USD 9.99
- RocketSim Yearly USD 49.99
- RocketSim Monthly USD 9.99
- RocketSim Monthly USD 6.99
- RocketSim Yearly USD 29.99
- Copyright
- © 2026 SwiftLee


