KotobaiaKotobaia terms of use
Updated September 11, 2026
App license
Kotobaia is an app from Sunimori. The Apple Standard End User License Agreement applies to the app distributed through the App Store. The link below provides the complete agreement.
Subscriptions and purchases
Available products, prices, service allowances and renewal terms are shown in the app and the Apple purchase sheet before confirmation. Subscriptions renew automatically unless cancelled through Apple. You can manage subscriptions in your Apple account settings. Deleting an app or a Kotobaia account does not cancel an Apple subscription. Refund decisions are handled by Apple.
Accounts and service access
Purchases and cloud allowances are linked to the Kotobaia account used to claim them. Keep access to your account secure and use the same account to restore purchases. Cloud services may require an internet connection and supported devices, and are subject to the usage allowances displayed in the app.
Learning and AI content
AI-generated explanations, translations and assessments can contain errors. They are learning aids and should be checked when accuracy matters. Use the app and any shared content lawfully and respect the rights of other users and content owners.
Privacy and contact
See our privacy policy. For questions, contact dev@sunimori.com.