Haha yes! I would LOVE to make the app for Android someday. But as a solo dev, it’s just too much to take on on my own. If Nihongo ever blows up and I make enough to hire someone to help me out, an Android app is top of my list.
Under the hood, it's actually using Google's Cloud OCR API. Not sure how well it handles 草書 or 隷書, but it does a pretty remarkable job with 行書. Also does surprisingly well with super pixelated text. I can look up words in 16-bit games trying to squeeze kanji into 16x16 sprites or something, and it holds up incredibly well.
You can also swap out the OCR API it uses. Right now I support Google and ocr.space.