Smouldering Durtles

4.9
167 reviews
10K+
Downloads
Content rating
Everyone
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About this app

Introducing Smouldering Durtles, your trusty companion app for the renowned WaniKani kanji learning platform, crafted by Tofugu! If you're on a quest to master Kanji with WaniKani, Smouldering Durtles is here to make your lessons and reviews engaging and enjoyable, with a plethora of features to enhance your learning experience.

Smouldering Durtles offers advanced searching capabilities, allowing you to quickly locate the exact Kanji or vocabulary you're looking for. Bolster your learning with self-study quizzes, testing your knowledge and helping you retain what you've learned. Customize your experience with a variety of themes to suit your personal style and make your study sessions visually appealing. Plus, never miss a review session with the convenience of offline reviews, ensuring your progress remains uninterrupted.

Please note that an active WaniKani account is essential to access this app's full potential.

Smouldering Durtles is an independent creation and is not officially supported or endorsed by Tofugu.
Updated on
Jan 29, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Personal info
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.9
159 reviews
Crow Richards
November 14, 2025
Such a great upgrade to wanikani! Especially love the undo feature, the comparison tables with JLPT/grade levels, and the customizable colors :) Suggestion for a feature you could add: I'd love the ability to choose which type of lessons to learn, i.e. only kanji, only vocab. The vocab reinforces my kanji knowledge so I often want to learn new vocab, but don't want to overwhelm myself with a bunch of new kanji. not sure if that's possible given you dont control the site, but would be cool :)
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Angel Ang
January 3, 2025
Been using for nearly a year now, great Wanikani app. Only reason why it's four stars and not five is because I'm noticing lately that some kanji reviews are mixing up onyomi and kunyomi readings. Ends up setting your mastery level back when the answer is "incorrect" as a result. Edit 1/03/25: The readings were becoming increasingly mixed, so I reset the database via the in-app settings. Seems to have fixed the issue.
2 people found this review helpful
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Ethan Goh
October 28, 2025
it's good, works as you'd require it. just one thing, could there be a feature to either blur or black out sample sentences, I have it blurred but sometimes my eyes wander and I can still technically make out what it says underneath without revealing the text, if it's fully blacked out it'd stop me from trying to interpret the sentence from the shape of the blur.
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What’s new

Bugfix!

Thanks to mchlnix who noticed that the new 'hide all mnemonics' setting, even if disabled, hides all notes when the 'hide if user note is present' setting is enabled.