bitrig

Vibe code, test, and deploy Swift apps. All from your iPhone.

Y CombinatorSummer 2025ActiveB2BEngineering, Product and Design

What they do

Problem

Building, testing, and deploying native iOS apps typically requires a Mac-based setup and a complex local development environment.

Solution

Bitrig is an iPhone app that lets users vibe code, test, and deploy native Swift iOS apps directly from their iPhone.

Who it's for

iOS developers and indie app creators who want to build Swift apps from their iPhone.

Founders

Kyle Macomber

Founder

Kyle is the co-founder and CEO of Bitrig. Before Bitrig, Kyle spent over a decade at Apple where he co-created and led the development of SwiftUI. He also managed teams behind Swift Charts, WidgetKit, and the Swift Standard Library. Kyle holds a degree in Computer Science from Stanford University.

LinkedIn · X

Tim Donnelly

Founder

Co-founder at Bitrig. Previously SwiftUI at Apple, Square, co-founder at Storehouse (acquired by Square). BFA Design, University of Washington.

LinkedIn · X

Jacob Xiao

Founder

Jacob is a co-founder of bitrig. Before bitrig, Jacob spent 15 years at Apple, where he co-created and led the development of SwiftUI. He also contributed to Xcode and UIKit during his time there. Prior to Apple, Jacob built Opacity, a graphical design tool.

LinkedIn · X