// Legal

Privacy Policy

Effective date: September 29, 2026

1. Overview

OpenSAK is a free, open source desktop application for managing geocaching data locally on your own computer. It runs on Windows, Linux, and macOS.

The short version:

Full source code: github.com/OpenSAK-Org/opensak

2. Data Stored Locally on Your Device

2.1 Geocache data

When you import GPX files or Pocket Query ZIP files, OpenSAK stores geocache information in a local SQLite database on your device — including cache names, GC codes, coordinates, descriptions, logs, attributes, and trackable listings. This data originates from files you supply. OpenSAK does not fetch this data independently.

2.2 User preferences

Home point coordinates, display preferences, filter profiles, and column layout are stored in your platform's standard application data directory and never leave your device.

2.3 Geocaching.com authentication token (optional)

If you connect OpenSAK to your Geocaching.com account (optional, requires API approval), an OAuth 2.0 token is stored locally with restricted file permissions. It is never transmitted to any OpenSAK server. You can delete it at any time by logging out.

PlatformToken path
Linux~/.local/share/opensak/gc_token.json
Windows%APPDATA%\opensak\gc_token.json
macOS~/Library/Application Support/opensak/gc_token.json

2.4 Pocket Query e-mail settings (optional)

If you set up Pocket Queries by e-mail, your mail server, port, security setting and username are stored in OpenSAK's settings file. The password is stored in your operating system's secure credential store (macOS Keychain, Windows Credential Manager, or the Secret Service keyring on Linux) — never in plain text.

OpenSAK connects only to the mail server you entered, over an encrypted connection, and verifies the server's certificate before sending your password. Nothing from your mailbox is sent anywhere else.

3. Data We Do Not Collect

There are no third-party SDKs, advertising networks, or tracking libraries in OpenSAK.

4. Geocaching.com API Integration (Optional)

When the optional API integration is enabled, OpenSAK may retrieve favorite point counts, trackable listings, and your find history directly from Geocaching.com on your behalf. This data is stored only in your local database and is subject to Geocaching.com's Privacy Policy.

5. Third-Party Services

5.1 Map tiles

The in-app map fetches tiles from OpenStreetMap servers, and loads the map component (Leaflet) from the unpkg.com content delivery network. Standard web requests may include your IP address. See OSM Privacy Policy.

5.2 Garmin GPS devices

Cache export to Garmin writes a GPX file via USB or MTP. No data is transmitted over the internet.

5.3 Update check and in-app updates (GitHub)

Unless you turn it off (Settings → Advanced → Check for updates automatically), OpenSAK asks GitHub's public API at startup which release is the newest — no personal data beyond what any web request includes, such as your IP address. The Microsoft Store version skips this check. Download & Install and Upgrade now download the new version and its checksum file from OpenSAK's release page on GitHub. See GitHub's privacy statement.

5.4 Boundary data (OpenSAK-Data)

Country, state and county lookup works offline. Only when you download boundary packs or check for boundary data updates does OpenSAK fetch files from the OpenSAK-Data release page on GitHub.

6. Your Rights and Data Control

There is no account to delete and no server-side data. Your data exists only on your device.

7. Children's Privacy

OpenSAK does not knowingly collect any information from children.

8. Changes to This Policy

Updates will be published on GitHub and announced in the OpenSAK Facebook community. The effective date above will be updated accordingly.

9. Contact

OpenSAK is free, open source software licensed under the MIT License.