Limrun
    Y CombinatorBacked by Y Combinator

    Unlock cloud agents
    for mobile dev

    We provide real-time remote XCode, iOS & Android Simulators so your cloud agent can build, validate and share its work with you through demo videos and live preview.

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    "Limrun has been an amazing partner. The team exceeded our expectation with their focus on quality and it is one of the few companies that is able to handle Replit's massive scale."

    Replit
    Michele CatastaHead of AI, Replit

    IN PRODUCTION AT

    Replitminitap aiMomentic AI
    Rork MaxRork Max
    Droidrun Cloud
    VibecodeVIBECODE
    x1.new
    Replitminitap aiMomentic AI
    Rork MaxRork Max
    Droidrun Cloud
    VibecodeVIBECODE
    x1.new
    Your agent in
    Cursor CloudCursor Cloud

    The build failure was a missing Combine import for the timer publisher; I've fixed that and will rebuild for verification.

    Sync code and trigger a remote build
    $ lim xcode build .
    Syncing . to instance ios_usea_01krqartm4fhnrwtzx10fcsc6y...
    Sync complete in 323ms.
    Starting xcodebuild...
    SwiftDriver (1 task) | 0.057 seconds
    Signing (3 tasks) | 0.045 seconds
    CopySwiftLibs (1 task) | 0.028 seconds
    AppIntentsSSUTraining (1 task) | 0.025 seconds
    Copy (4 tasks) | 0.024 seconds
    ProcessInfoPlistFile (1 task) | 0.006 seconds
    Touch (1 task) | 0.003 seconds
    RegisterExecutionPolicyException (1 task) | 0.001 seconds
    ConstructStubExecutorLinkFileList (1 task) | 0.001 seconds
    Validate (1 task) | 0.000 seconds
    SwiftMergeGeneratedHeaders (1 task) | 0.000 seconds
    SwiftDriver Compilation (1 task) | 0.000 seconds
    SwiftDriver Compilation Requirements (1 task) | 0.000 seconds
    Build Succeeded
    Build completed in 4.153984s
    Installing to simulator...
    Installed to simulator in 808.247208ms
    Build succeeded (exit code 0)

    The app now builds and installs successfully in Limrun; I'm checking the accessibility tree and will drive the game flow through interval selection, start, hits, timeout, and retry.

    How it works

    Native remote services that your agent can compose on the fly as it needs.

    XCode

    Realtime remote builds

    The code is synced to our remote XCode service when a build is triggered, so you can keep your agent in your favorite sandbox.

    • Stream build logs realtime,
    • Attach to a simulator for fast reload,
    • S3-backed cache for warm builds,
    • Idle/build time pricing.
    SwiftSwift
    React NativeReact Native Dev Builds
    Other frameworks

    The build failure was a missing Combine import for the timer publisher; I've fixed that and will rebuild for verification.

    Sync code and trigger a remote build
    $ lim xcode build .
    Syncing . to instance ios_usea_01krqartm4fhnrwtzx10fcsc6y...
    Sync complete in 323ms.
    Starting xcodebuild...
    SwiftDriver (1 task) | 0.057 seconds
    Signing (3 tasks) | 0.045 seconds
    CopySwiftLibs (1 task) | 0.028 seconds
    AppIntentsSSUTraining (1 task) | 0.025 seconds
    Copy (4 tasks) | 0.024 seconds
    ProcessInfoPlistFile (1 task) | 0.006 seconds
    Touch (1 task) | 0.003 seconds
    RegisterExecutionPolicyException (1 task) | 0.001 seconds
    ConstructStubExecutorLinkFileList (1 task) | 0.001 seconds
    Validate (1 task) | 0.000 seconds
    SwiftMergeGeneratedHeaders (1 task) | 0.000 seconds
    SwiftDriver Compilation (1 task) | 0.000 seconds
    SwiftDriver Compilation Requirements (1 task) | 0.000 seconds
    Build Succeeded
    Build completed in 4.153984s
    Installing to simulator...
    Installed to simulator in 808.247208ms
    Build succeeded (exit code 0)

    The app now builds and installs successfully in Limrun; I'm checking the accessibility tree and will drive the game flow through interval selection, start, hits, timeout, and retry.

    iOS & Android

    Feedback loop

    Your agent can drive the remote simulators from anywhere to validate its work.

    • Built-in AX tree calls or your favorite framework,
    • Video recording with 60fps,
    • Realtime log streaming from running app,
    • Batch actions for millisecond precision.
    AppiumAppium
    MaestroMaestro
    DetoxDetox
    limrun.com/stream
    Previews

    Share and demo

    Your agent can present its work so you can review without having to install or download anything.

    • Preview link that lets you use the simulator remotely from the browser,
    • Demo video that your agent can request,
    • Install to your device directly from the browser over WebUSB for real device testing.
    acme-inc / swift-app

    feat: add new scoring mechanism #144

    Open
    Favorite Agent wants to merge into main
    F
    Favorite Agent

    I have implemented the new scoring mechanism and validated the fix by playing it in the simulator that it fixes the mentioned bug.

    Watch Demo Video (0:45)
    Rork LogoRork
    "Limrun team has done a fantastic job to make this possible. Highly recommend!"
    — Levan Kvirkvelia, CTO at Rork
    Momentic AI Logo
    "The Limrun team are world class infrastructure operators. We were able to get to market 10X faster compared to building our own solution on top of a hyperscaler."
    — Jeff An, CTO at Momentic AI

    Ready to build faster?

    Get started with Limrun today and bring the power of native development to your agent sandbox.