PlinthPrivacy policy
Last updated 22 October 2026
Plinth is built so that your home stays on your device. This policy explains what the app processes, when anything leaves your device, and who handles it. It applies to the Plinth app for iPhone and to this website.
On your device
Room scans (walls, doors, windows, furniture and their measurements), the 3D model and floor plan, names you give to homes and rooms, and the redesign ideas you receive are stored only in the app's storage on your device. They are not uploaded to us. Deleting a room or a home in the app deletes its scan and its ideas. Deleting the app deletes everything.
The camera is used to scan rooms. It is used to take a photo only when you choose to add one to a redesign request.
When you ask for redesign ideas
Only when you tap "Generate ideas", the app sends the following to our server to create the ideas:
| What | Why |
|---|---|
| The chosen room's measurements: floor outline, doors, windows, and each piece of furniture's size and position | To propose layouts that fit the room |
| A plain 3D render of the room from the viewpoint you chose, and renders of the proposed layouts | To create the images |
| Your style choice, your written wishes and the pieces you marked to keep | To follow your brief |
| A photo of the room, only if you add one. Photos are resized and re-encoded on your device first, which removes location and other metadata | To match your materials and colours |
| A random app identifier, created without any personal details | To limit the number of requests per day and prevent abuse |
We do not ask for your name, email address or any account, and we do not use the data for advertising or tracking.
Who processes it
- Google Cloud and Firebase (Google LLC) run our server in the European Union (europe-west1) and provide the random app identifier. Google processes request data, including your IP address, to deliver the service.
- Anthropic (Claude) receives the room measurements, the render, your brief and any photo to write the redesign ideas.
- Google Gemini API receives the layout renders, the idea descriptions and any photo to create the images.
These providers process the data on our behalf to return the result. Under their API terms they do not use it to train their models, and they may keep it for a limited time for safety and abuse monitoring.
What we keep
Our server does not store your measurements, renders, photos or ideas. It keeps only a counter of how many requests each random app identifier made per day, which is used for the daily limit. Server logs record the time of a request, the random identifier, the room's name and the number of ideas; Google Cloud deletes them after 30 days.
Children
Plinth is not directed at children under 13, and we do not knowingly collect personal information from them.
Your choices and rights
You can use scanning and the 3D explorer without ever sending anything. You can delete rooms and homes at any time in the app. Because we do not keep your room data, there is nothing on our side to export or delete beyond the daily counter; contact us if you want it removed. Depending on where you live, you may have rights to access, correct or delete personal data and to complain to a data protection authority.
Changes
If we change how data is handled, we will update this page and the date above, and describe significant changes in the app's release notes.
Contact
Pasca Marius, swampiapps@gmail.com