Frequently Asked Questions

Yes. DAYWIKA is free forever. No time limit, no credit card. Free includes a daily total of 30 words (new and review combined), the full personalized algorithm, one language, basic statistics, and up to 100 custom words. PRO adds unlimited learning, up to three languages, unlimited certification mode and custom mode, up to 100K custom words, and in-depth AI analytics. 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 日本語, Español, Français, 한국어, and 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 enables unlimited learning, up to three simultaneous languages, unlimited certification mode and custom mode, up to 100K custom words, and in-depth AI analytics that unlock as your learning data grows. Certification mode and custom mode can be explored and set up on Free too — PRO is only needed when you actually apply them. The personalized algorithm is identical on Free and PRO: paying expands volume and reach, not the quality of the memory algorithm.

Yes. Both monthly and annual Pro subscriptions start 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 across the account; PRO holds up to 100K.

Yes. Free plans can also import Excel and CSV files directly in the app. PRO is needed once your custom words pass 100 in total. If your list comes from Anki or another format, use the Resources converter to turn it into a DAYWIKA CSV first, then import that file in the app.

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.