Privacy policy

Lumenspar · last updated 11 October 2026

Lumenspar is a desktop app that runs entirely on your computer. It has no server, no accounts of its own, no analytics and no advertising. Its authors receive none of your data.

What stays on your computer

• Your wish history, inventory scans, exports and logs.
• Settings, including any API key or Google sign-in, saved in files only your user account can read.
• Wish history links are used once and never saved: they carry a temporary key to your wish history.

Google Drive backup (optional)

If you turn it on, Lumenspar signs in to Google through Lumenspar's Google Cloud project (or, if you choose, a project of your own) and asks for two permissions:

• drive.appdata: a hidden folder in your Google Drive that only Lumenspar can use. Lumenspar cannot see, read or change any other file in your Drive. It stores your wish history there, one file per game account (UID).
• email: your email address, shown in the app so you know which account is signed in.

This data goes only between your computer and your own Google account. Signing in through Lumenspar's project gives its maintainer no access to your Drive, your wish history or your email address; Google only shows the maintainer overall usage numbers, such as how many requests the app makes. Lumenspar's use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements. To stop it, press Sign out in the app, or remove access at myaccount.google.com/permissions. The backup itself can be deleted in Google Drive under Settings → Manage apps, with the app's Delete hidden app data option.

Web viewer

The Lumenspar viewer is a web page that runs entirely in your browser. When you sign in with Google there, it asks only for drive.appdata (Lumenspar's hidden folder in your Drive) and reads the summary the desktop app backs up there. The sign-in token stays in the page while it is open and is sent only to Google; nothing is sent to Lumenspar or anyone else, and nothing is stored in the browser, except a web client ID of your own if you choose to enter one.

Services Lumenspar contacts

• HoYoverse's wish history service, to read your wish history, using the link the game itself created.
• Enka.Network, if you make build cards or import characters from your in-game showcase by UID.
• Akasha.cv, for your characters' leaderboard ranks and, when you ask the optimizer to rank like Akasha, a sample of a leaderboard. Your UID is sent to look up your profile; from leaderboards Lumenspar keeps only stats, sets and results, never other players' names or UIDs.
• Project Amber (gi.yatta.moe), to download character and weapon portraits. No personal data is sent.
• Google Gemini, only if you enter your own API key for the AI reader. Screenshots of in-game item cards are sent to it for reading.

Each of these services handles requests under its own privacy policy.

See also the terms of service.

Contact

Questions or concerns: github.com/Galog1/lumenspar/issues.