EDIT: https://kotoba.capetown 
TLDR
As a fellow Japanese learner and software engineer, I’ve created a web app to help me memorise kanji and improve my vocabulary. It’s meant to be used on mobile device. After using it regularly for a long time, I’ve found it highly effective. Now, I’m considering sharing it with others. The app will be free, it would be great to see people use it. Would you be interested in giving it a try? If so, please post a message here and/or fill in the form (https://forms.gle/q59CHAQ71rz6ToDfA) so I can contact you when the app is ready. I would not like spend time on something nobody wants 
Screenshots and recording:
Background
I used Wanikani extensively and reached level 21, which gave me a solid foundation in basic kanji and familiarity with more advanced ones. To reinforce what I’d learned, I began reading texts without furigana to challenge myself. But I noticed a recurring problem: sometimes, I couldn’t confidently recognise kanji that I should know—like basic ones such as 私. I realized that something about Wanikani’s approach—or the way I processed it—wasn’t working for me. Maybe it was because kanji were presented in isolation without enough context, or perhaps it was because I wasn’t practicing writing kanji by hand.
Finding a Better Approach
At different points, I tried handwriting kanji with a pen-and-paper method. But simply writing the same kanji over and over again wasn’t working—it felt inefficient. Even after writing a kanji 50 to 100 times, I still struggled to recall it confidently. So I began mixing things up: writing 10 kanji in random order instead of focusing on one for a long time. This approach was better, but I knew it could be improved.
Enter the App
That’s when I decided to create my own solution—an app I named “Kotoba”. It’s simple but effective: the app shows me a word’s reading (and meaning if necessary), and my task is to draw with my finger the correct kanjis of given word on the screen. After that, I self-check it by comparing my writing to the correct kanji (in some ways it’s similar to Kanji Study app). The app lets me decide whether to retry, practice other kanji I’ve learned, or move on to a new word. One of the key benefits of this app is the flexibility—it doesn’t overwhelm me with a backlog of reviews, and I can use it whenever I have time, without feeling guilty or like I’m falling behind. I tend to remember practised kanji better because drawing is much more effective that just looking at a kanji. Plus, I reinforce my vocabulary too.
The Future of Kotoba
The app has worked well for me. Since I built it for personal use, it still has some rough edges. Before making it public, I’d need to polish it up a bit. That’s where you come in. Would you be interested in using it? What features would excite you? I’ve thought about adding things like pre-made word sets (e.g., “Top 100 Kanji” or “N2 Kanji”), but I’d love to hear your thoughts. If you have suggestions for features or improvements, I’m open to your input
(
