Keichapp Lab (hereinafter referred to as “we”) develops and provides the app (hereinafter referred to as “the App”) and the services provided by the App (hereinafter referred to as “the Service”). By downloading or using the App, the user automatically agrees to these Terms of Service (hereinafter referred to as “the Terms”). Therefore, we recommend that the user reads the Terms in full before using the App.
Please note that the original text of these Terms is written in Japanese. If there are differences in meaning or nuance in translations into other languages, the original Japanese text will take precedence.
Free Version and Premium Version
Free Version
All functions of the App are currently available for free by viewing ads. The types, content, and frequency of ads may change from time to time. If ads cannot be loaded due to network troubles, the Service may be restricted.
Premium Version
By subscribing to the paid version, the user can use all the functions of the App without ads.
Subscriptions
Monthly Subscription
By subscribing to the monthly Premium version, the user can access all the features of the Premium version of the App every month as long as the subscription is not canceled. If canceled, the user will lose access to all Premium features. The monthly subscription automatically renews each month unless canceled.
Annual Subscription
By subscribing to the annual Premium version, the user can access all the features of the Premium version of the App every year as long as the subscription is not canceled. If canceled, the user will lose access to all Premium features. The annual subscription automatically renews each year unless canceled.
Fees and Billing
We strive to ensure that the App is as useful and efficient as possible. Therefore, we reserve the right to change the App for any reason and to charge for the Service. If we charge for the App or Service, we will make it clear what the user is paying for.
Information Collection and Use
The App stores and processes personal data the user provides to deliver the Service. It is the user’s responsibility to keep their smartphone or tablet and access to the App secure. We do not recommend jailbreaking or rooting the device, as this can make it vulnerable to malware, viruses, and compromise the device’s security features. This may result in the App not functioning correctly or at all.
The App uses third-party services that declare their terms of service.
Links to the terms of service of third-party service providers used by the App:
Prohibited Activities
The user is not permitted to reproduce, modify, or reverse engineer the App, any part of the App, or our trademarks in any way. The user also must not attempt to extract the source code of the App, translate it into other languages, or create derivative versions. All trademarks, copyrights, database rights, and other intellectual property rights related to the App belong to us.
Disclaimer
Some features of the App require an internet connection, which may be Wi-Fi or mobile data. If the user cannot access Wi-Fi or exceeds their mobile data limit, the App may not work correctly, and we are not responsible for this. When using the App outside Wi-Fi areas, mobile data terms apply, and the user may incur data charges. Using data roaming abroad may result in additional roaming charges. The user is responsible for any charges incurred by using the App. If someone else pays for the device the user is using the App on, the user is assumed to have their permission to use the App.
We are also not responsible if the user cannot use the Service due to a dead battery on their device. The user must manage their device’s battery responsibly.
We rely on information provided by third parties and are not responsible for the completeness or accuracy of the information provided through the App, even if direct or indirect losses occur.
Changes to the App and Termination
We may update the App’s content and functions. The App is currently available on iOS/Android devices, but we may expand support to other systems or change system requirements in the future. To keep the App running smoothly, regular updates may be necessary. However, we do not guarantee the App will always support the user’s iOS/Android device version or stay up-to-date. We recommend accepting updates when available.
We reserve the right to stop providing the App or terminate its use at any time without notice. When the App is terminated, any rights or licenses granted to the user will also end, and the user must stop using the App and delete it from their device if necessary.
Changes to the Terms
These Terms may be updated periodically. Therefore, we recommend that users regularly check this page for changes. We will notify users of any changes by posting the new Terms on this page.
Contact Us
If users have any questions or suggestions about these Terms, please contact us via contact form .
Last updated: September 14, 2025