It's fast, it's fun, and it's full of information, if having a bunch of information all in one place is your jam.
This next app (yes, it's app month) isn't exactly new, but they did just add the ability to copy/paste from Anki, WaniKani, and Kanji Koohi, so it's worth a mention in our book.
Kanji Drop is like if Tetris and Japanese had a baby. Wait, that already exists. It's like if a bunch of students said, "Can't I just use a game to learn kanji!" And the teacher said, "No, but play this and you'll recognize ones you've already learned."
Kanji and radicals fall from the top of the screen in blocks and you place them trying to create bigger and more complex kanji and match words. Creating a kanji combines two blocks together, while making a word will destroy the blocks (and sometimes the blocks around it). As you create kanji and words, the game reads their pronunciation aloud, and the meanings and readings pop up, too.
If the game is going too fast for you to keep up, you can pause at any time. You can also look at all your history, all of the characters and words you've created, as well as an absolute TON of info like stroke order and JLPT level. You can even read the mnemonic stories from Kanji Koohii without leaving the app.
It's fast, it's fun, and it's full of information, if having a bunch of information all in one place is your jam.