Co-founded the iOS automation app Workflow with Conrad Kramer; Apple bought it in 2017 and it became Shortcuts, the automation layer across iOS, iPadOS and macOS that Weinstein kept leading inside Apple. Left Apple in 2023 and reteamed with Kramer at Software Applications Incorporated to build Sky, a natural-language assistant that could see and act in any Mac window. OpenAI acquired the company in October 2025, and the team's work resurfaced as Computer Use in Codex — agents that operate ordinary software end to end through its interface.
Co-founded the iOS automation app Workflow with Conrad Kramer; Apple bought it in 2017 and it became Shortcuts, the automation layer across iOS, iPadOS and macOS that Weinstein kept leading inside Apple. Left Apple in 2023 and reteamed with Kramer at Software Applications Incorporated to build Sky, a natural-language assistant that could see and act in any Mac window. OpenAI acquired the company in October 2025, and the team's work resurfaced as Computer Use in Codex — agents that operate ordinary software end to end through its interface.