Privacy Policy

Last updated: July 17, 2026

What Matchbook Is

Matchbook is a companion application for League of Legends that helps players improve through structured journaling, game recording, and performance tracking. Matchbook is currently available on macOS with plans to expand to additional platforms.

Matchbook isn't endorsed by Riot Games and doesn't reflect the views or opinions of Riot Games or anyone officially involved in producing or managing Riot Games properties. League of Legends and Riot Games are trademarks or registered trademarks of Riot Games, Inc.

What Data We Collect

Data You Provide Directly

• Display name and Riot Games account information (game name, tagline, region)
• Journal entries (session goals, reflections, mood, energy level, per-game notes)
• Champion notes and matchup guides
• Learning objectives
• Gameplay flag annotations and recording notes
• Custom tags you create and apply to sessions or moments
• Game-knowledge entries you write or import
• Focus themes and practice goals you set
• App settings and preferences
• An email address and password — only if you choose to create an optional sync account

Data Fetched from the Riot Games API on Your Behalf

When you link your Riot Games account, Matchbook requests the following data from the Riot Games API:

• Riot account identifier (PUUID)
• Match history and match details (champions played, game statistics, outcomes, items, runes)
• Match timeline events (kills, deaths, objectives, timestamps)
• Ranked tier, division, and LP

This data is fetched solely to provide Matchbook's journaling and analysis features. Matchbook only reads data from the Riot API — it never modifies your Riot account or game data.

While the League client is running, Matchbook also reads live game state directly from the client on your machine (game phase, champion select, lobby, rune page, ranked stats). This connection stays entirely on your device — nothing from it is sent over the internet.

Data Generated on Your Device

• Screen recordings of your League of Legends gameplay
• Video clips extracted from recordings
• Statistical snapshots and trends calculated from your match history
• LP progression history sampled during your play sessions
• A local log of which Matchbook features you use (never sent to any analytics service)

Where Your Data Is Stored

By default, all data is stored locally on your device. Matchbook never requires an account, and without one your data stays on your Mac.

• Structured data (profiles, matches, journals, notes, flags, stats, settings) is stored in a local database on your device.
• Video recordings and clips are stored as files in your local application data directory.
• Your Riot Games API key is stored in your operating system's secure credential storage (macOS Keychain), encrypted by the operating system. If you sign in for sync, your sign-in session tokens are kept there too.

Optional Cloud Sync

Matchbook offers optional multi-device sync. Sync only runs if you choose to sign in — there is no sign-in wall, and the app is fully functional offline without an account. If you do sign in:

• Your structured data — sessions, matches, journals, reflections, notes, flags, tags, knowledge entries, stats, settings, and recording metadata — syncs to your account on Matchbook's cloud infrastructure, hosted on Supabase.
• Video recordings and clips never sync. Only their metadata (titles, timestamps, flags) does; the video files stay on your Mac.
• Signing out stops syncing, and the app keeps working with your local data.

Third-Party Services

Riot Games API

Matchbook connects to the Riot Games API to fetch your match history and game statistics. This connection uses your Riot account information and is subject to Riot Games' Privacy Notice and Developer Policies.

• Match data is used solely to provide Matchbook's features to you
• Matchbook does not redistribute, resell, or publicly expose Riot API data
• Matchbook does not store data beyond what is necessary for the app's functionality
• All Riot Games trademarks and game data are the property of Riot Games, Inc.

Matchbook also fetches static game assets — patch versions, champion data, champion portraits, item icons — from Data Dragon, Riot's public asset service, and a small set of game icons (such as objective and minimap artwork) from CommunityDragon, a community-run mirror of League's game assets. These requests contain no personal data.

OP.GG

Matchbook fetches aggregate champion matchup statistics (for example, game-wide win rates for a matchup) from OP.GG. These lookups are about champions, not about you — they do not include your Riot account identity.

Supabase (optional sync only)

If you sign in for sync, your synced data is stored in your account on Matchbook's cloud infrastructure, hosted by Supabase. We use this data only to provide sync. If you never sign in, nothing is synced and no account data exists.

No Analytics, Ads, or Trackers

Matchbook does not use third-party analytics services, crash reporting tools, advertising networks, tracking pixels, or any other third-party data collection. The local log of feature usage described above stays inside your own data and is never sent to any analytics service. No data is sent to any AI service.

Data Retention and Deletion

You have full control over your data:

• Delete individual matches, sessions, recordings, journal entries, champion notes, or any other data at any time within the app.
• Matchbook's auto-cleanup feature can automatically remove old recordings after a configurable number of days.
• Uninstalling Matchbook removes the application. Your data files can be removed by deleting the Matchbook folder in your application data directory.
• If you use optional sync, signing out stops syncing. To have your account's synced data deleted, email us at hello@matchbook.gg and we'll remove it.

Data Sharing

Matchbook does not sell, rent, or share your personal data with anyone. Outbound data transfers are limited to:

• Riot Games API — requests to fetch your match data (using your account information).
• Data Dragon — requests for static game assets (no personal data).
• CommunityDragon — requests for static game icons (no personal data).
• OP.GG — requests for aggregate champion statistics (no personal data).
• Sync (optional) — if you sign in, your structured data syncs to your account on Matchbook's cloud infrastructure. We use it only to provide sync.

Every transfer above occurs directly from your device.

Our Website

This website (matchbook.gg) is a static site hosted on GitHub Pages. We run no analytics, cookies, or trackers on it. The site loads its fonts from Google Fonts, which means your browser sends your IP address to Google when the page loads, subject to Google's privacy policy. GitHub Pages may also log standard request data as described in GitHub's privacy statement.

Children's Privacy

Matchbook is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe a child under 13 has provided personal information through Matchbook, please contact us.

Changes to This Policy

We may update this privacy policy from time to time. Changes will be noted by updating the "Last updated" date. Significant changes will be communicated through the app or our website.

Contact

Email: hello@matchbook.gg