Learn to write Kanji

I don’t use any apps for this, but there are several handy scripts that will display the stroke order for WaniKani kanji. I believe this one is currently working:

I personally prefer this one generally, because it’s less obtrusive, but I don’t think it’s currently working for me. Hopefully the author will find a fix soon.

Yomichan will also show you the stroke order of any kanji in any word that you mouse over, though I’m slightly hesitant to recommend it now because the creator just stopped maintaining it. But it’s a popular tool and is open source, so someone else will probably take up the mantle for it.

There are also these printable kanji sheets made by a WK user, which you can print for free and practice writing the kanji in the order that you learn them on WK: