Koehiyori Support

For questions or bug reports, email [email protected]. A reply may take a few days. The app is currently Japanese only.

What to include

• The name Koehiyori and the app version
• Your device, OS version and when the issue occurred
• Steps to reproduce and any error message you saw

Do not send passwords, payment card numbers or full diary entries. Hide unnecessary personal information in screenshots.

Sign-in and verification emails

Use the same sign-in method you used to register. If you registered with Google or Apple, use that provider's button. For email registration, open the verification link. If it has not arrived, check your spam folder and email address, then request another email in the app.

Missing letters or notifications

Check connectivity, trial/subscription status, AI consent, delivery times and your time zone. Notifications require both device permission and the app's separate morning/evening switches. During your active period, letters are still available in the app when notifications are off. Generation and notifications may be delayed.

Audio will not play

Check connectivity, volume and audio output such as Bluetooth, then reopen the letter. If the issue persists, tell us the letter's date and whether it is a morning or evening letter.

Restore purchases or cancel

Open Settings → Plan and free trial (「料金・無料体験」) to restore purchases or refresh your subscription status. Use the same store account as your original purchase.

• iOS: Apple subscription cancellation instructions
• Android: Google Play subscription cancellation instructions

Cancel before the next renewal, allowing at least 24 hours. Deleting the app or account or withdrawing AI consent does not cancel your subscription. The free trial never charges automatically.

Request account or data deletion

In the app, open Settings → Privacy (「プライバシー」) → Delete all data (「すべてのデータを削除する」). You can also delete only diaries and memories, or delete individual letters and their audio.

If you cannot access the app, request deletion by email. Use the subject “Koehiyori account and data deletion” and include your registered email address, sign-in method and what you want deleted. Send from your registered email if possible. We will verify your identity before processing. Do not send passwords or verification codes.

Deletion covers your account, profile, diaries, memories, letter text and audio. We retain the identity hash and trial start time used to prevent repeated trials, and the deleted user ID and deletion timestamp used to prevent account recreation. These retained records have no automatic expiry. See the Privacy Policy. Cancel any subscription separately through your store.