Privacy

The stair app

Projects, 3D geometry, measurement records, photos, notes and recoverable drafts are stored locally on your device. The app does not automatically upload them to us. Device backups may include app data, depending on your Apple settings. You can delete projects and drafts in the app and export your project files. Exported copies must be deleted wherever you shared or saved them.

Usage analytics in the iOS app

When you allow usage analytics, Google Firebase receives events about which main pages you open, active foreground time per page or editor visit, and broad staircase and stringer type categories. It also receives purchase and subscription events (product ID and price), a random app ID and basic device details.

Aggregate insights show which staircase types are used most. We use them to prioritize further app development and manually optimize our Google Ads campaigns. App events are not automatically imported as Google Ads conversions in the current configuration. The app does not use the iPhone advertising ID, and app data is not used to personalize ads.

Project IDs or names, exact dimensions, 3D geometry, photos and notes are not sent for analytics. Limited measurement signals may still be sent to Google before you choose or if you decline. You can change your choice at any time on the Privacy page in the app. You may manually share technical error codes without project content. Online services may process necessary security and operational logs.

Professional portal

Staircase3D stores account information, listing content, unit prices and currency, selected market areas and billing references needed to provide the professional listing service.

Location

The iOS app may use a device coordinate to identify a market area. The coordinate is used for the lookup and is not stored in the marketplace database.

Sharing with professionals

You can open a professional's website without sharing the staircase. Only explicit sharing adds dimensions, staircase options and quantities to the website URL. The complete editable input for all levels is temporarily stored encrypted, with a retrieval URL that expires after one hour. Expired rows are cleaned up every minute. Project names, photos, notes, archived parts and 3D meshes are excluded. The recipient is responsible for subsequent processing; consult their privacy policy.

Anyone holding the retrieval URL can access it while it remains valid. URLs may appear in browser history and necessary operational logs. To prevent abuse, we temporarily store a one-way IP hash, listing identifier and timing metadata with the encrypted share.

Payments

Editing-access purchases in the iOS app are processed by Apple. The app reads Apple-verified transactions to determine access and does not store payment-card details. Professional listing payments on the web portal are handled separately by Stripe. The portal stores Stripe customer and subscription identifiers, not payment-card details.

Contact

Privacy requests can be sent to Widding Systems AS through the contact details at widdingsystems.com.