Notes
Handwriting recognition is hard, so this tool doesn't check if you got it
right at all. Reveal the correct kana and decide for yourself if
you're close enough.
There are some kana with ambiguous romanji. The kana for shi and
chi, with a " (dakuten), are pronounced the same: ji. And the kana
for su" and tsu" are both pronounced zu. See
Yotsugana for more
info. To work around this, I'm using di to represent chi" and du to
represent tsu".
I haven't included any digraphs, since they use the same symbols as the
ordinary kana. Including them doesn't really add anything, and skews the
kana you practice (for example you would get way more practice at ya, yu,
and yo than any other kana).