Make the part that fits.
Scan something with your iPhone, send a photo of it, or just describe it. Counterpart makes the part that fits it on your Mac, then prints it on your own printer.
Counterpart is in early testing and isn't available to download yet.
Four ways to start
- Scan it
- Scan the real thing with an iPhone or iPad that has a LiDAR scanner. It captures the shape in millimetres.
- Photograph it
- One or two photos and a sentence about what you want. A ruler or caliper in the picture helps with sizes.
- Describe it
- “A hook for a 25 mm tube that holds a mug.” Sizes in your words are enough to start.
- Paste a link
- A published model on MakerWorld or Printables. It prints the designer's own file, credited to them.
How it works
Send it from your phone
Your scan, photos and description go straight to your Mac, over your Wi-Fi or your own private iCloud. Counterpart has no servers of its own.
Your Mac makes it
Counterpart uses your own Claude Code login and Blender to make the model, so Claude sees what you sent. If it can't see a part well enough, it asks you for a close-up.
Check it on your phone
See pictures and the size in millimetres. Ask for changes in plain words, like “make it 2 mm wider”.
Print it
Choose your printer and filament, see the time and filament it needs, and confirm on the printer's own terms.
What you need
- An iPhone or iPad with iOS 27. Scanning needs a model with LiDAR (Pro models). Photos and descriptions work on any.
- A Mac with Counterpart running in the menu bar. On the same Apple Account, your iPhone finds it by itself.
- Claude Code, signed in on that Mac. Counterpart uses your login to make models.
- Blender on that Mac. Counterpart opens it only while it works on a project.
- A 3D printer and its MCP server. Counterpart uses your existing setup as it is.
Help
Quick answers below. The full guide is on the Help page.
My phone can't find my Mac
Check that both are on the same Wi-Fi and that Counterpart is running on your Mac (its icon is in the menu bar). On your phone, open Settings, then Counterpart, and turn on Local Network.
The pairing code says it expired
Codes only last a few minutes. Click the Counterpart icon in your Mac's menu bar to show a fresh code, then scan it with your phone.
Making it stopped with an error
The message on the object says what went wrong. The usual cause is Claude Code not being signed in on your Mac. Fix that, then open the object and tap Try Again.
It asked me for a close-up
Your Mac couldn't see one part clearly. Take a photo close to that part, or tap Best Guess to let it carry on without one.
The print has not started
Open the project to see the latest printer status and any message from your printer service.
The size is a little off
Phone scans are good to a few millimetres. For a part that has to fit exactly, measure the important size with a caliper or ruler and tell it in plain words, or put the caliper in a photo.