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The iOS Simulator companion for developers and AI coding agents
The Simulator,
supercharged.
RocketSim adds 30+ developer tools to Xcode's Simulator, so you and your AI coding agent can inspect, test, and capture your app without leaving your flow.
No signup. Works with Xcode 16+ and Xcode 27's Device Hub.
RocketSim at a glance
Used by iOS developers at
- 25,000+ developers
- 250+ teams
- Up to 2× faster, developers report
Agentic Coding
Your agent can finally see the Simulator.
The built-in CLI and Agent Skill let Cursor, Claude, Codex, and Xcode read the screen, tap, type, and verify their own work. Follow along live in your browser and point at exactly what needs to change.
# Check RocketSim is ready rocketsim doctor# Read the screen as text, not pixels rocketsim elements --agent# Tap the Continue button rocketsim interact tap --label "Continue"# Wait until the screen changes rocketsim wait screen-changed# Test on a slow network rocketsim network set 3g# Record proof for the PR rocketsim video record --touches > demo.mp4About 95%
less of your agent's context than other Simulator-control tools.
- fewer tokens
- 99%+
- faster
- About 24%
Head-to-head benchmark, July 2026. Tokens and context estimated from output size.
Screenshots & Videos
Captures worth sharing.
Record the Simulator with device bezels and touch indicators, polish it in the Post Editor, and drag the result straight into App Store Connect, GitHub, or Slack.
Touch indicators and device bezels. Demos anyone can follow, ready to post.
Record at 120 FPS. Scrolling, animations, and transitions stay silky smooth.
A built-in Post Editor. Trim, reframe, and restyle after you hit stop.
Drag it anywhere. App Store Connect, GitHub, Slack, or iMessage, straight from the floating capture.
09:41 in one click. The keynote-ready status bar, full bars included.
Bezels, backgrounds, ratios. Marketing-ready screenshots without opening a design tool.
Developers can't stop talking about it.
4.8 stars on the App Store
Network Monitoring
See every request. Before you set a breakpoint.
Inspect URLSession requests, responses, headers, and app logs as they happen, without a proxy or certificates. Throttle the connection, flip on airplane mode, and hand your AI assistant a privacy-redacted summary.
Made possible by Pulse, an open-source project created by Alex Grebenyuk.
For you
Start building faster today.
Free to download, no signup. Unlock Pro when you need more.
Free downloadFor your team
Make the whole team faster.
Shared licenses and Team Build Insights. Try it free for 14 days.
Start a 14-day Teams TrialDevelopers report building, testing, and verifying apps up to 2× faster with RocketSim.
Real-World Testing
Reach the states that are hard to reach.
Send push notifications, open deep links, simulate walking and driving routes, and reset permissions in one click. Then test the same deep links and routes on a real iPhone or iPad.
Design & Accessibility
Pixel-perfect, and usable by everyone.
Overlay the design on your running app, measure with grids and rulers, and slow animations down to catch every frame. VoiceOver Navigator shows the reading order right on the Simulator — no device needed.
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Drop in the design and check your build with an overlay or a slider. Differences jump out right in the Simulator.
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Overlay a grid to align elements across the screen. Change its color and spacing to match your design system.
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Horizontal and vertical rulers show exact positions in points. Hold ⇧ Shift to see the distance between them.
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Hold ⇧ Shift to magnify any pixel, then copy its color as SwiftUI, UIColor, or NSColor code.
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Slow every animation down to catch the frame where a transition goes wrong.
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Find missing labels, small touch targets, and low contrast on the screen you are looking at. Select a finding to see it highlighted in the Simulator.
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See the VoiceOver reading order as numbered labels, and walk through it with your arrow keys. No device needed.
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Switch Dynamic Type sizes, bold text, inverted colors, and reduce motion without digging through Settings.
Build Insights for Teams
Know when your builds get slower.
Track every Xcode build, compare clean and incremental times, and see how machines and Xcode versions affect your whole team. It syncs in the background, with no build scripts.
“RocketSim Team Insights finally gives us visibility into our build times beyond just gut feeling.”
Join thousands of productive developers.
See what others say about RocketSim on social media.
Spend less time operating the Simulator.
Spend more time building your app.
No signup. Works with Xcode 16+ and Xcode 27's Device Hub.
Stay ahead of what's new in RocketSim.
New releases, beta invites, workflow improvements, and early-access announcements in your inbox.