Frequently Asked Questions

Common questions about using Kotoba.

Q.Can I use Kotoba offline?
A.
Yes. Once you obtain a deck, all cards and progress data are stored on your device, and study sessions run fully offline. Your study history syncs automatically in the background when you're back online.
Q.Where can I purchase decks?
A.
Deck purchases are made through the "Store" tab in the Kotoba mobile app. On this website you can only browse the deck list and the first 20-card preview.
Q.How does login work?
A.
Enter your email address and we'll send you a magic link. Tap the link and you're logged in — no password needed.
Q.Is there audio playback? How do I set it up?
A.
Yes. The 🔊 button on each card plays Japanese audio. Available on every version of the Kotoba app (iOS / Android / Web). Setup: In the app, open Settings → Voice → Voice Settings and pick a Japanese voice installed on your device (or your browser). Leave it on "Auto-select" and Kotoba picks the highest-quality voice automatically. For a more natural-sounding voice, install higher-quality voices for your environment: • iOS: Settings → Accessibility → Spoken Content → Voices → Japanese → Enhanced / Premium • Android: Settings → Language & input → Text-to-speech → Install voice data • Web (browser): On Microsoft Edge / Chrome, "Microsoft Nanami Online (Natural)" and similar Online voices are highest quality