Welcome to Koto support.
Koto helps you build Japanese vocabulary and listening skills with quick, bite-sized quizzes.

If you need help, please check the FAQ below. If you still can’t solve the issue, contact us anytime.

Contact

Email: s-rank-property@outlook.com
When contacting us, please include:

Your device model (e.g., iPhone 14)
iOS version
App version (Settings app → Koto)
A short description of the issue (+ screenshots if possible)

Frequently Asked Questions

1) How do I use Koto?

Choose a level/group to study.
Answer quick multiple-choice quizzes.
Review words you missed and repeat regularly.
Use audio (if available) to train listening and pronunciation.

2) Does Koto work offline?

Some features may require an internet connection (for example, loading content or audio).
If you are offline, please try again after connecting to Wi-Fi or mobile data.

3) Audio doesn’t play. What should I do?

Please try:

Turn your device volume up
Disable Silent Mode (Ring/Silent switch)
Disconnect Bluetooth devices (AirPods/speakers) to test
Force close the app and reopen
Restart your iPhone

If the issue continues, email us with your device + iOS version.

4) Progress is not updating / looks wrong.

Try:

Closing and reopening the app
Updating to the latest app version
Restarting your device

If you still see incorrect progress, contact us with details of what you expected vs what you see.

5) I purchased Pro, but it’s still locked.

Please try:

Confirm you are using the same Apple ID used for purchase
Open the app and tap Restore Purchases
Ensure you have a stable internet connection

If it still doesn’t unlock, contact us and include a screenshot of your App Store subscription page (personal info can be hidden).

6) How do I cancel my subscription?

Subscriptions are managed by Apple. To cancel:

Open Settings
Tap your Apple ID
Tap Subscriptions
Select Koto
Tap Cancel Subscription

Canceling stops future renewals. Your access continues until the end of the current billing period.

7) How do I request a refund?

Refunds are handled by Apple. You can request one via Apple’s “Report a Problem” page and select your purchase/subscription.
If you need help identifying the correct transaction, email us.

8) Can I transfer my subscription to another Apple ID?

Apple subscriptions cannot be transferred between Apple IDs.

9) I found a mistake in a word/translation.

Thank you—please email us with:

The word (Japanese)
What you think is wrong
A screenshot (if possible)
We’ll review and improve the content.

Troubleshooting Checklist

Before contacting support, please try:

Update iOS
Update Koto to the latest version
Restart your device
Reinstall Koto (only if you’re okay with local data possibly resetting)

Privacy

Koto values your privacy.
For details, please see the Privacy Policy inside the app or on the official website (if provided).