Show DEV: RunWhale — build and preview apps on your phone with DeepSeek Harness

Description and use

RunWhale lets developers build and preview Expo/React Native apps entirely on their phone, combining edit, review, and preview in one device.

Problem

Developers need a way to prototype and iterate on mobile app ideas without a laptop nearby.

Outcome

RunWhale allows developers to prototype Expo/React Native apps entirely on their phone, reducing dependency on laptops and speeding up iteration cycles.

Workflow

• Create or import a project on the phone
• Describe desired changes to the agent
• Agent edits project files
• Review changes via Git interface
• Open web or native preview on the phone
• Iterate as needed

Evidence

Project files, Node.js, Git, development tools, and the preview server run on the device.

Source

The part I wanted to bring together is that edit–review–preview loop on a phone.

Source