You can use ComfyUI from a phone by opening a ComfyUI server running on another computer, or by using a hosted ComfyUI service. The phone is the interface; generation happens on the computer or cloud GPU.
The short answer
A phone can control ComfyUI through a browser when the ComfyUI server is reachable from that phone. On a trusted home network, the computer runs ComfyUI and the phone opens its local address. Away from home, use a properly authenticated private network or a hosted service designed for remote access.
The model does not move into the phone. ComfyUI remains a node-based interface and inference engine running on the computer or cloud environment. The phone sends workflow actions and receives previews or outputs.
Choose local network, private remote access, or cloud
Local-network access is the simplest option when the phone and computer are on the same trusted network. Official ComfyUI portable documentation describes enabling the server’s listen option so another device can connect. Firewall rules still need to allow the chosen port.
For access outside that network, do not forward an unauthenticated ComfyUI port directly to the public internet. Prefer an authenticated private VPN or tunnel you administer, or use an official hosted service with access controls. Remote access expands the security boundary to workflows, uploaded images, model files, custom nodes, and API credentials.
Make a desktop workflow usable on a small screen
Prepare and test the graph on the computer first. Group the controls you change most—prompt, seed, size, model, and output—near one another. Save a known-working workflow before using the phone so an accidental drag or connection change is recoverable.
Large graphs are difficult to inspect precisely on a touchscreen. Use the phone for queueing a prepared workflow, changing a short prompt, checking progress, and downloading a result. Return to the computer for graph construction, custom-node debugging, model management, and fine connection work.
Know where private images travel
On a local network, source images travel from the phone to your ComfyUI computer. Through a cloud service, they travel to that provider. Through a remote tunnel, traffic crosses the tunnel even if the destination remains your computer. Review authentication, transport security, retention, backups, logs, and custom-node behavior before uploading sensitive material.
Downloading a result to the phone can also place it in cloud-backed storage. ‘Self-hosted’ describes the inference server, not every later sharing or backup choice.
PhoneDiffusion availability and article scope
PhoneDiffusion does not run ComfyUI, its graph, custom nodes, or desktop extensions. PhoneDiffusion performs its supported workflows on iPhone or iPad with curated model packs; ComfyUI runs separately on a computer or hosted server.
A hybrid workflow is manual: export an image or preserve a prompt and seed, then continue in the other tool. Different models, schedulers, runtimes, and numerical paths may not reproduce identical pixels even when the visible settings look similar.
Field notes
- A phone browser can control ComfyUI, but generation still runs on the ComfyUI computer or cloud server.
- Use a trusted LAN, authenticated private network, or purpose-built hosted service; do not expose an open port publicly.
- Prepare the graph on desktop and use the phone for a small set of repeatable controls.
Try it on your phone
- Install and verify ComfyUI on the computer using the official documentation.
- Save a known-working workflow and place the controls you change together.
- Enable access only on a trusted local network and confirm the firewall boundary.
- Open the computer’s local ComfyUI address from the phone and test with non-sensitive input.
- Use authenticated private access or an appropriate hosted service when connecting away from home.
Sources and verification
Primary and maintainer documentation checked for this guide. Product-specific details were reviewed against the current PhoneDiffusion scope.
- ComfyUI — official documentationOfficial overview of ComfyUI as a node-based interface and inference engine, including local and cloud operation.
- ComfyUI — local-network setup for the portable buildOfficial instructions showing that another device can access a ComfyUI server on the local network by enabling its listen option.