Echo Cards


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Echo Cards

Echo Cards is a flashcard app with tons of gamification to keep you motivated! It has built-in Japanese kanji and vocabulary from KanjiDamage, and supports creating and sharing custom decks of flash cards to share.
This was made as a personal project to study kanji, but custom decks allows you to create and use flashcards for anything you need to practice! So feel free to sign up and take a look

How Echo Cards works

To start off, you can enable various core decks in the Decks tab. There are core decks for things like Japanese or sheet music. Click on the deck, and press the "enable" button to indicate, that you're actively pracitcing the cards in the deck. From this page, you can also adjust in which pile each card is in.

From here, you can also make custom decks. Custom decks allow you to practice whatever you want. You can use raw JSON-format to share cards or create cards outside of Echo Cards and import them.


When you review a card, it will sleep for an increasing amount of hours each time, before coming back for review. If you take a break from Echo Cards for more than 2 hours, you will receive rested XP, which doubles your XP-gain for a time.

When you review cards, you answer honestly if you could recall the answer or not. If you did, the card moves up a rank, indicating your progress on learning the card. This increases its sleep time. If you didn't remember, it goes back to the beginning, giving you more opportunities to remember the card better. Cards in the lower ranks come back faster, meaning you will practice them more.


You gain XP from reviewing cards, which in turn levels you up. There's a cosmetic icon for every 5 levels, and whenever you level up, you unlock a new player icon to equip and show off at the leaderboard. Player Icons have different rarities. Each deck also progresses its icon as you progress the cards in it. Ocassionally, there are timed events during which you can unlock limited exclusive player icons.


Thanks to for compiling kanji and jukugo and creating mnemonics and descriptions.
Thanks to to the people who created the kanji database: Tamaoka, K., Makioka, S., Sanders, S., & Verdonschot, R. G. (2013). The new 2136 Japanese Jōyō kanji web-accessible database. Accessible at the web site
Thanks to the developer of the Japanese stroke order font, over at