Run a Private Docker Registry on Your iPhone

We built something unusual during a weekend hackathon: a fully working Docker registry that runs directly on iOS. No servers, no external setup, and no cloud required. Just install the app and your iPhone becomes a portable registry.
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This is ideal for demos, CI environments, air-gapped testing, or just having a local registry you can carry in your pocket.

We’ve been working on RepoFlow, a self-hostable and cloud-ready alternative to Artifactory and Nexus. It supports Docker, npm, PyPI, Maven, and more.

As a side project, we decided to explore whether the Docker registry API could be implemented natively on iOS. It turns out, it can.