Privacy policy
Last updated: 22 October 2026
Trimmel ("the app", called PC Optimizer before version 0.2.0) is a free, open source desktop application for Windows that helps you free up disk space, manage startup programs, move installed programs between drives and update drivers. This policy explains what information the app handles, why, where it is stored, and the choices you have.
In short: the app runs entirely on your own computer. The developer operates no servers, receives no data from the app, and does not sell, share or transfer your information to anyone.
1. Information the app accesses
Google account information (only if you sign in with Google)
Note: Google sign-in is optional and is not included in version 0.2.0. This section applies to any version that includes it.
When you click "Sign in with Google", the app requests the standard OpenID Connect scopes openid, email and profile. Google then gives the app:
| Data | Why the app needs it |
|---|---|
| Your name | Shown in the sidebar to confirm who is signed in. |
| Your email address | Shown as a tooltip on your name in the sidebar. |
| Your profile picture URL | Received as part of the profile, not currently displayed or stored. |
| A unique Google account identifier | Used to confirm the sign-in is valid. |
The app does not request or access your Gmail, Google Drive, Calendar, Contacts or any other Google service or data.
Information on your computer
To do its job, the app reads and, only when you choose an action, changes things on your own PC: temporary files and browser caches (to show their size and delete them), startup entries, the list of installed programs and drivers, and system statistics such as CPU, memory and disk usage. This information is used on your device and is never uploaded.
2. How information is used
- Google account information is used only to show you that you are signed in and to keep you signed in between launches. It is not used for advertising, profiling, analytics or any other purpose.
- Computer information is used only to show you results and carry out the actions you ask for.
3. Storage and security
- Your name and email are held in the app's memory while it is running and are not written to disk.
- The app keeps a small settings file on your PC, in
%APPDATA%\trimmel: your reminder preference, the date of your last cleanup and whether you have seen the welcome guide. It is never uploaded. - To keep you signed in, the app stores a Google refresh token in the Windows Credential Manager, protected by your Windows account. It is not stored anywhere else.
- Sign-in uses the OAuth 2.0 authorization code flow with PKCE, and the app verifies the signature and contents of the ID token Google returns.
- No Google information is sent to the developer or to any server operated by the developer.
4. Sharing and disclosure
The app does not share, sell, rent or transfer Google user data or any other personal information to third parties. The only network connections the app makes are to Google (to sign you in, in versions that include sign-in), to Microsoft Windows Update (when you ask it to check for drivers), and to this project's website (when you choose “Check for updates” in Settings, which downloads a small public file listing the latest version number; the app sends no personal information with that request). The app contains no analytics, advertising or tracking code.
5. Google API Services User Data Policy
Trimmel's use and transfer to any other app of information received from Google APIs will adhere to the Google API Services User Data Policy, including the Limited Use requirements.
6. Retention and deletion
- Choose Sign out in the app to delete the stored token immediately.
- Choose Also delete my settings when uninstalling, or uninstall the app, to remove everything it stored. You can also delete the "trimmel" entry (or "pcoptimizer", if you used an earlier version) in Windows Credential Manager.
- You can revoke the app's access to your Google account at any time at myaccount.google.com/permissions.
Because the developer holds none of your data, there is nothing on any server to delete.
7. This website (not the app)
The Trimmel app contains no analytics and sends no usage data. This website, trimmel.app, uses Umami, a privacy-focused analytics service, to count visits and clicks so the developer can see which pages and downloads are used.
- It sets no cookies and does not follow you across other sites. Umami describes itself as not collecting personal information or storing IP addresses.
- It records page views, the page you came from, your browser, operating system, screen size and approximate country, and counts clicks on the download buttons and the Plus interest link.
- It respects your browser's Do Not Track setting. If you block the script, the site works the same.
- Downloading the installer does not send anything else about you or your PC.
8. Children
The app is not directed at children under 13, and the developer does not knowingly collect information from children.
9. Changes to this policy
If this policy changes, the updated version will be posted on this page with a new "last updated" date.
10. Contact
Questions or requests about this policy: conobr97@gmail.com.