Limrun
Docs
Y CombinatorBacked by Y Combinator

Unlock cloud agents
for mobile dev teams

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.

0 minutes streamed in the last week

"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 CatastaPresident & Head 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
agent-deviceagent-device
ArgentArgent
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.