Solvance has one look, the dark one you see, chosen for evening use; there's no light theme. Text follows your browser's zoom (⌘/Ctrl and + makes everything larger), and inside notes you can pick a font and size from the editor's toolbar.

The website is in English. The notes, tags and practice names you write are yours, in any language.

The website needs an internet connection: a sit you time while offline isn't saved until you're back online, so wait for the connection before pressing Complete. Ambient sounds stream, so they need a connection too.