Privacy Policy

Last updated: 15 June 2026 · Grompalytics is an independent, non-commercial prototype / proof of concept.

Grompalytics provides computer-generated, post-game analysis of League of Legends matches to help a player reflect on and improve their own play. We collect as little as possible and store no personal accounts. This policy explains exactly what data is handled and how.

1. Information we process

The Riot ID you search (game name, tag line and region). Used only to look up public match data through the official Riot Games API for the duration of your request.
Public match data returned by the Riot API — match summaries and timelines for the games you choose to review. This is information Riot already makes publicly available.
A prototype access key you enter to use the Service, validated on each request.

2. What we do NOT collect or do

We do not create user accounts and never ask for or store passwords, emails, or Riot login credentials.
We do not sell, rent, share, or monetise any data, and we run no third-party advertising or tracking.
We do not maintain a long-term database of match history. Match data is fetched live and held only in a short-lived in-memory cache to reduce load on the Riot API.
We do not attempt to de-anonymise players, expose a player's historic Riot IDs, or reveal information beyond what the Riot API already provides.
We do not provide any real-time, in-game information or advantage — the Service is strictly post-game and reflective.

3. Automated analysis

The analysis shown in the product is computer-generated. When you request a review, a compressed, anonymised summary of the selected match (no login or personal contact information) is sent to a third-party large-language-model provider (DeepSeek) which produces the move-by-move analysis. The result is returned to your browser and is not retained by the Service after the request completes. The model is explicitly instructed to be constructive, to focus on the requesting player's own improvement, and to never shame, insult, blame or disparage any player.

4. Reviewer API keys

If a Riot Developer Relations reviewer supplies a temporary RGAPI- key, it is used only for that session's requests, transmitted over HTTPS, kept in memory for the browser tab only, and never written to disk, logged, or stored in any database.

5. Local storage in your browser

To keep your session usable across browser tabs, the Service stores your prototype access key and the analyses you have already generated in your browser's local storage. This data stays on your device, is never sent to any third party, and is cleared when you choose “Sign out”. No tracking or advertising cookies are used.

6. Data retention

Server-side caches are in-memory only and expire automatically (match data within hours, profile data within minutes); they are lost on server restart. No long-term or personal database is used.

7. Riot Games compliance

Grompalytics uses the Riot Games API and Data Dragon assets in accordance with Riot's Developer Terms and General Policies. The Riot API key is held server-side only and never exposed to the browser. League of Legends assets (champion, item, rune, spell and profile icons) are served via Riot's Data Dragon. We do not use the Riot Games logo or trademarks as our brand.

8. Contact

For any privacy question about this prototype, contact the operator at the email associated with the project.

Grompalytics 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. Riot Games and all associated properties are trademarks or registered trademarks of Riot Games, Inc.