Privacy
Short version: your practice data never leaves your device.
What is stored
Your answers, scores, streak, skill estimates and settings are saved in your browser's local storage (or, in the Android/iOS app, in the app's private storage). They are not sent to any server. Clearing site data or uninstalling the app deletes them. You can export or delete them at any time from More → Your data.
Microphone (Think aloud)
If you choose to record yourself in Think aloud, the recording stays in the page's memory on your device so you can play it back, and is discarded when you leave the page. It is never uploaded or saved. The optional live transcript uses your browser's built-in speech recognition; some browsers (for example Chrome) send that audio to their own speech service to transcribe it. It is off unless you turn it on.
Fonts
The typefaces are part of the app and load from it; no font service is contacted.
Accounts
There are none. The app works without signing in.
Analytics
The website may count page views with GoatCounter, a privacy-friendly service that sets no cookies and collects no personal data. Counting is skipped if your browser sends "Do Not Track". The native apps do not count anything.
Third parties
Links to sources (e.g. Glassdoor, Wikipedia, SEC filings) open those sites, which have their own policies. The app does not embed advertising or tracking from anyone else.
Contact
Questions: open an issue at github.com/pingadom/theo.
Last updated: October 2026.