Xcode forces you to test one simulator at a time. Switch simulator, rebuild, run, check. Repeat for every screen size and iOS version. If you are building something like a multiplayer app, you need multiple simulators running side by side and there is no good way to do it.
MultiSim changes how you work with simulators. One shortcut, every open simulator builds and launches at the same time. iPhone SE to iPad Pro, iOS 15 to iOS 26, all running your latest code simultaneously. Up to 20x faster than the manual loop.
The log viewer auto-detects which simulator is active and shows its output instantly. Switch to a different simulator, logs follow. View all simulators at once with ALL/APP filtering. New entries get highlighted in real time. URLs in your logs are clickable. Color coding, custom fonts, zoom, dark theme, fully customizable.
Focus never leaves your editor. Trigger builds from VS Code, Terminal, Cursor, anywhere. Xcode works in the background. You never get interrupted.
Now preparing an MCP integration so AI coding tools can trigger builds and read simulator output directly.
Free on the Mac App Store.
Website: multisim.tr
Video: https://youtu.be/4CIO1587v_0
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