Privacy policy

rentczecher collects no personal data. This page lists every connection the app and this website make, so you can see exactly where your data goes.

What the app keeps

• Your profiles, saved and hidden listings, photos and price history are stored only on your computer, in the app's own data folder.
• There is no account, no server, no analytics, no crash reporting and no tracking. Nothing is ever sent to the author.
• Uninstalling the app and deleting its data folder removes everything it kept.
• You can save chosen profiles to a file, to add them on another computer. The file holds your searches and their preferences, never listings, and stays wherever you save it, even after the app is uninstalled.

Who the app talks to

The app connects only to the services below, each for the one purpose listed. Each of them sees your IP address, as any website you visit does.

• The real-estate portals you turn on, and their image servers. When you run a scan it reads your saved searches and downloads each new listing's main photo. It reads a listing's advert and its other photos when you open or star it.
• OpenStreetMap's tile server (tile.openstreetmap.org), to draw street maps.
• Public OpenStreetMap Overpass servers (overpass-api.de, overpass.private.coffee, overpass.kumi.systems), to find nearby places such as shops or stops. They receive the map area around a listing and the kinds of places to look for, nothing else.
• GitHub (github.com, with downloads served from githubusercontent.com), where the app's releases are published. When the app starts and once a day after that, it asks whether a newer version is out, and it downloads one only when you choose to update. GitHub counts each check and download, so the author sees how often the app checks, but not who checked.
• A link to an advert, Mapy.com or Google Maps opens in your web browser, and from there that site's own privacy policy applies.

This website

• rentczecher.cz is a static site hosted on GitHub Pages. It sets no cookies and runs no analytics.
• GitHub, as the host, may log technical data such as your IP address, under GitHub's own privacy statement.
• Your choice of light or dark theme is remembered in your browser only.

Contact

Questions about privacy go to matej.schrodl@gmail.com.

Last updated on 31 October 2026.