RocketSim alternative
Another way to drive the iOS Simulator
RocketSim is a well-known tool and we respect it. If you want an alternative that adds a built-in network proxy, an App Store screenshot generator and a one-time lifetime price, CosmoKit is built for you.
Everything for the daily loop
Boot and manage simulators, capture screenshots and video from the menu bar or a global shortcut, and keep your recent captures one click away.
A real network proxy
Inspect and intercept simulator traffic with CosmoKit's built-in MITM proxy. No separate proxy app, no manual certificate juggling.
From capture to App Store
Turn any capture into framed, ready-to-upload App Store screenshots with the built-in generator. Device frames included.
What you get with CosmoKit
- Simulator control without the terminal (boot, erase, appearance, permissions, Face ID)
- Screenshots and video recording, with device frames and GIF export
- App Store screenshot generator
- Push notification testing
- Deep link testing with saved links
- GPS location and route simulation
- MITM network proxy for simulator traffic
- Agent CLI, MCP server and Agent Skill (Claude Code, Cursor, Codex)
- Live browser stream with click-to-element feedback
- Multiple simulators side by side
- Menu bar quick capture and a global capture shortcut
- English, Spanish and Portuguese localization
- Free tier to start, subscription or one-time lifetime purchase for Pro
Comparing tools? Both apps evolve quickly, so check the RocketSim site for its current feature list and pricing and decide what fits your workflow.
Try CosmoKit free on your Mac
The free tier covers capture, push, deep links, GPS and simulator tools. Pro adds the proxy, unlimited simulators and watermark-free exports, as a subscription or a single lifetime purchase.
Requires macOS 14+, Xcode and the iOS Simulator.