Privacy Policy — Perron

Last updated: February 17, 2026

Overview

Perron is a Wear OS watch complication that displays upcoming public transport departures for your nearest station. Your privacy is important — the app is designed to collect the minimum data necessary to function.

Data We Collect

Location Data

Perron uses your device's location (GPS and network-based) to determine the closest public transport station. Location data is:

• Processed entirely on your device
• Cached locally for up to 5 minutes to reduce battery usage
• Never transmitted to any server other than as described below
• Never stored permanently

Transport Data

To fetch departure information, the app sends requests to the Swiss Public Transport API (transport.opendata.ch). These requests contain:

• Station names (derived from your location)
• Your configured route preferences

The Swiss Public Transport API is a public, open-data service operated independently. Please refer to their privacy policy for how they handle requests.

User Preferences

Your route configurations and app settings are stored locally on your watch. They are never transmitted to any external server.

Data We Do NOT Collect

• No personal information (name, email, account)
• No analytics or usage tracking
• No advertising identifiers
• No crash reporting
• No data shared with third parties

Permissions

Permission	Purpose
Location (fine/coarse)	Detect nearest transport station
Background location	Update complication while on watch face
Internet	Fetch departure times from transport API

Children's Privacy

Perron does not knowingly collect data from children. The app does not require an account or collect personal information.

Changes to This Policy

Updates to this policy will be reflected on this page with an updated date.

Contact

Questions about this privacy policy? Reach out at hey@yannickpulver.com.