Frequently Asked Questions

Yes. DAYWIKA is free forever. No time limit, no credit card. The Free plan includes 30 new words a day, unlimited reviews, the full personalized algorithm, one language, and up to 100 custom words. Pro adds unlimited new words, up to three languages, certification mode, and the complete analytics suite. The core algorithm itself is identical on both plans.

Most apps keep users coming back through streaks, characters, and points. DAYWIKA doesn't. Instead, it tracks how fast you personally forget each individual word, then brings it back at the exact moment you need it. An algorithm shaped entirely by your data, for you alone. Less decoration, and more of the words that actually stick.

Today you can learn Japanese (日本語), Spanish (Español), French (Français), Korean (한국어), and German (Deutsch), with more on the way. The app interface is available in English, Korean, and Japanese.

With Pro, yes. Up to three languages at once, each on its own independent algorithm. Your progress in one language doesn't interfere with another. On Free you study one language at a time, and you can switch anytime.

Pro removes the daily word cap, adds up to three simultaneous languages, unlocks certification mode for exam-targeted vocabulary, raises custom words to unlimited, and opens the full analytics suite. That includes 12 widgets covering vocabulary forecasts, review-load planning, accuracy trends, and weekly reports. Importantly, the personalized algorithm is identical on Free and Pro. Paying buys more volume and reach, not a better memory algorithm.

Yes. Every Pro subscription starts with a 7-day free trial. Cancel before it ends and you won't be charged.

Subscriptions are handled through the App Store or Google Play. Manage or cancel from your store account anytime. Your Pro access continues until the end of the current billing period, and refunds follow each store's policy. Use Restore Purchase in Settings to recover a subscription on a new device.

Yes. Enter the word, meaning, part of speech, and language, and it joins your personalized review just like the built-in vocabulary. Free holds up to 100 custom words; Pro is unlimited.

Not as a file import yet. For now, use the template and converter on the Resources page to prepare your external word lists in DAYWIKA's format, then add them as custom words in the app. No rebuilding from scratch.

Core review works offline. Your daily queue is available without a connection. Cloud sync and analytics need internet.

If you signed in with Google or Apple, your data and algorithm sync to the cloud and restore when you sign in on the new device. Guest mode keeps data only on the device, so it can be lost on a device change. Signing in is recommended.