Nexus Inc. (hereinafter referred to as "the Company") establishes the following Privacy Policy regarding the handling of users' personal information in the services provided.
"Personal information" refers to "personal information" as defined by the Act on the Protection of Personal Information. This includes information that can identify a specific individual through descriptions such as name, date of birth, address, phone number, email address, as well as data related to appearance, fingerprints, voiceprints, and health insurance card insurer numbers.
The Company collects personal information through the following methods.
The Company uses personal information for the following purposes.
The Company will change the purposes of use of personal information only when the change is reasonably recognized as being related to the purpose before the change. When a change occurs, users will be notified through the method prescribed by the Company.
The Company will not provide personal information to third parties without prior consent, except in the following cases.
The Company may share personal information with subcontractors and partner companies (cloud service providers, analytics service providers, etc.). In such cases, the Company will execute appropriate contracts and ensure thorough information protection.
The Company allows users to create accounts, log in, and use the Service through the following Third-Party Social Media Services.
When a user registers through a Third-Party Social Media Service or otherwise grants the Company access to such service, the Company may collect personal data already associated with the user's Third-Party Social Media Service account, such as the user's name, email address, activities, and contact lists associated with that account.
Users may also have the option to share additional information with the Company through their Third-Party Social Media Service account. If a user chooses to provide such information and personal data during registration or otherwise, the user authorizes the Company to use, share, and store such information in a manner consistent with this Privacy Policy.
The Company implements the following measures to protect personal information.
Users have the following rights.
The Company will respond to the exercise of these rights promptly and in good faith.
To display, create, edit, notify, and sync calendars and events, we handle calendar information on your device and Google Calendar information obtained and updated through the Google Calendar API. If you connect an external calendar such as Google, that information is also managed in accordance with each service provider's privacy policy.
We use Firebase Authentication and Firestore for account authentication, syncing your profile and app settings, shared calendar features, and saving event templates. Depending on the features you use, we store profile settings, device information, sharing-related information, and event template titles, locations, notes, and repeat and notification settings.
To provide integration and sharing features, we store the authentication credentials required for the Google integration (access tokens and refresh tokens) in Firebase, which we manage. We do not obtain or store your Google account password.
For AI event creation and analysis, we use the text and images you enter or provide to convert them into event candidates.
For voice input, your device's speech recognition converts speech into text. To create and analyze events, the converted text may be sent to Apple's Private Cloud Compute, or to Google Gemini via Firebase Cloud Functions. How speech recognition is processed depends on your device and OS features and settings.
Text you enter directly and images you provide for event creation are also processed by Apple's Private Cloud Compute, or by Google Gemini via Firebase Cloud Functions. Which processor is used depends on factors such as device support, and simple text may be processed on your device.
Event color suggestions are normally processed on your device on supported devices and OS versions. Available features and processing methods vary by device, OS, and settings.
To verify and restore purchases and manage entitlements to paid features, we use RevenueCat and send information such as user identifiers and purchase information.
To create invitation links for shared calendars, carry over invitation information, and measure acquisition channels, we use Firebase Cloud Functions and AppsFlyer. When an invitation link is generated, we send information such as the inviter's display name, the calendar name, the calendar ID, and an invitation token to AppsFlyer. To associate acquisition with app users, we also send the signed-in user's identifier to AppsFlyer. Depending on settings, this processing may also involve device information, identifiers, IP addresses, and information about installs and link usage.
To provide event reminders, shared calendar update notifications, and to-do notifications, we use event information on your device, notification settings, and notification tokens. Notifications are sent via Firebase Cloud Messaging (FCM) or Apple Push Notification service (APNs). Shared notifications may include event titles, dates and times, calendar names, display names, and to-do names.
To analyze service usage, investigate errors, measure performance, deliver app configuration, and prevent abuse, we use Firebase Analytics, Crashlytics, Performance Monitoring, Remote Config, and App Check. Depending on app launches and feature use, settings, consent, and device environment, we send information such as user identifiers, interaction events, app and device information, errors, performance information, and information needed to verify the app's integrity to each service.
We use Google AdMob to display ads, manage consent, and measure ad performance. Advertising identifiers and similar information are handled according to your consent, device settings, app settings, and usage environment. Ad and consent management are also subject to the policies of the Google AdMob service provider.
You can change permission to use advertising identifiers in your device settings. The paid version stops displaying ads.
When you use place search, we send the search terms you enter, the language, and, where needed, a search area based on your current location to the Google Places API to obtain place suggestions and details. The information obtained is used to enter and display event locations.
When you use URL previews, your device accesses the URL to obtain metadata such as the page title, description, and images in order to display the preview. The policies of the accessed website also apply.
Communication also occurs when we retrieve information needed to display announcements, help content, profile images, and similar content from their sources, and those sources receive communication information such as your IP address.
When you submit an inquiry, we send the message body, reply email address, reply preference, the signed-in user identifier, app and device information, language settings, Pro status, diagnostic information, attached images, and similar information to Firebase in order to reply and investigate issues. The items sent vary depending on your input and usage environment.
The Company uses AI technology to improve the Service, but does not use users' personal data for training other AI models. The Company also ensures transparency regarding AI processing.
When a user deletes their account or individually requests data deletion, the following process is followed.
The Company retains personal information for the period necessary for service provision or the period required by law. Data whose retention period has expired is appropriately disposed of.
The Company may process personal information on servers outside Japan. In such cases, the Company complies with the EU General Data Protection Regulation (GDPR) and other international data protection standards. Standard Contractual Clauses (SCC) are applied and protective measures are taken.
The Service requires parental consent for minors. Minors should use the Service only after obtaining parental consent.
In the event of a personal information breach, users will be promptly notified and the following measures will be taken.
The contents of this Policy may be changed without notice to users, except for matters otherwise stipulated in this Policy or by law. Unless otherwise determined by the Company, the revised Privacy Policy shall take effect from the time it is posted on this website.
For inquiries regarding this Policy, please contact the following.
Company name: Nexus Inc.
Contact: contact@nexus-inc.net
Established: September 17, 2025
Last updated: September 28, 2026
For users located in Taiwan, we hereby disclose the following in accordance with the Personal Data Protection Act (PDPA) of the Republic of China (Taiwan):
The Traditional Chinese version of this Privacy Policy is the authoritative version. Versions in other languages are provided for reference only. In the event of any inconsistency between language versions, the Traditional Chinese version shall prevail.