Settings
Sync and backup
Your ticks and mock scores are saved in this browser. Turn on sync to see them on your phone and your computer. Sync uses a private code: anyone with the code can see and change your progress, so keep it to yourself.
Backup
Download everything as a file, or restore it on any device. Restoring adds to what is here; newer changes win.
Appearance
Install on your phone
iPhone: open this site in Safari, tap Share, then Add to Home Screen. Android: open it in Chrome, tap ⋮, then Install app or Add to Home screen. It then opens like an app and works offline.
On an iPhone, the Home Screen app keeps its own storage, apart from Safari: ticks made in Safari don't show in the app. Use the app for your ticks, and if you also use a computer, turn on sync inside the app (or type your code on its Sync page).