Privacy
This app follows the Model Teaching Apps Privacy Notice. This page covers only what is specific to Clock Study.
What Clock Study saves on your device
None of it is sent anywhere, with one exception: when you generate a worksheet PDF (see below).
| Item | What it holds | How long it lasts |
|---|---|---|
| Device identifier | A random ID stamped on anything you save, so your saved items stay grouped. Never sent anywhere. | Until you clear it |
| Preferences | Your theme, sound, and “clear on close” choices. | Until you clear it |
| Saved quizzes and worksheet templates | Configurations you have saved, plus any title you typed for them. | Until you clear it (most recent 30 kept) |
| Mastery and scores | Your accuracy by question type, your best Beat the Clock times, and the date you last finished the daily challenge. | Until you clear it |
| Active session | The practice set you are currently working through, and whether each answer was correct. | Until you close this browser tab |
| Analytics opt-out flag | Set only if you have turned analytics off in this browser. | Until you turn it back on |
What Clock Study sends to our server
When you generate a worksheet PDF, we receive the settings you chose, plus a title (up to 120 characters) and instructions (up to 400 characters) if you typed any. We use this only to build the PDF and send it back. We do not store it or log it.
Please do not type a student’s name or any other personal information into the title or instructions.
Analytics
We use Fathom Analytics to count visits and see which features get used. Fathom sets no cookies, reports at the country level only, and briefly sees your IP address before discarding it within 24 hours. On September 8, 2026, we removed Google Analytics and Vercel Web Analytics from every Model Teaching app. Fathom is now the only analytics tool on this site. Read more, or turn analytics off in this browser, on the Model Teaching Apps Privacy Notice.
Children’s privacy
Clock Study is made for children, including children under 13. We do not collect personal information from your child: no name, no email address, no login, no photo. The only automatic data is described above and in the Model Teaching Apps Privacy Notice.
Clearing your data
Open Settings in Clock Study to clear what this app has saved on your device. The Model Teaching Apps Privacy Notice also has a button that clears data for every Model Teaching app at once, including this one, because every app shares one browser origin.
Questions
Send questions through the Contact page.
Last updated: September 8, 2026.