Vowels on text that prints without them
Most seforim a learner meets after the siddur — the Mishnah Berurah, the Shulchan Aruch, the Sichas — print without nekudos, and a child who cannot yet read unpointed Hebrew cannot read them at all. Nekudos supplies the vowels as a reading aid: a second, pointed copy laid over the printed text, never replacing it, and offered only where the work has actually been done.
וְאָהַבְתָּ בְּבֵיתֶךָ וְדִבַּרְתָּ
Whole or nothing
A se’if is pointed in full or not at all. A half-pointed se’if leaves a learner unable to tell which words were checked, so the switch is offered only on the se’ifim that have a complete pointed copy, and the list badges which those are.
Rashei teivos stay bare
An abbreviation stands for words that are not written, so it is never pointed — סו״ס and ע״פ keep their gershayim and nothing else.
The printed text is untouched
Every point is a reading somebody supplied, so it lives beside the text, marked as added. Turn the switch off and you are reading exactly what the Chofetz Chaim printed.
Where it stands
The Mishnah Berurah’s opening simanim are done and the count grows weekly — the siman list badges every pointed one. The rest of the sefer and the Shulchan Aruch are the next work, and the dashboard shows the number moving.
Who it's for — For the child moving from siddur to sefer, for the ba’al teshuvah, and for anyone who reads pointed Hebrew fluently and unpointed Hebrew slowly. Plus and up. Where a text is already pointed (Chumash, Tehillim, Tanya, Kitzur) the switch simply shows or hides the printed vowels.
One toggle on the reader's toolbar, and it follows you from the Siddur to the Kitzur.