Privacy Policy for Caldendrium

Last updated: June 14, 2026 · Effective upon App Store release

1. Overview

Caldendrium is a plant cultivation log app, with a focus on caudex and succulents, developed and operated by an individual developer in Japan. This policy describes what information the app accesses, where the information is stored, and how we approach your privacy.

Summary: Caldendrium stores all of your data in services you already control (such as your Apple iCloud account). The app does not run its own server, does not transmit your data to the developer, and does not use any analytics, advertising, or tracking SDKs. If you uninstall Caldendrium, your data remains in your own accounts.

2. Information We Collect

Caldendrium does not collect any personal information from you. The App Store privacy label is registered as Data Not Collected.

The information you create with the app (such as plant entries, work records, notes, photos) is written directly to your Apple Calendar / Photo library through the iOS-provided APIs. The developer has no access to that information.

3. Where Your Data Is Stored

The data you produce while using Caldendrium is stored exclusively in:

We do not have copies of these data. Your control over them is governed by Apple’s terms of service and privacy policy.

4. Permissions Requested

Caldendrium requests the following iOS permissions only when needed:

You may revoke any of these permissions at any time via Settings → Privacy & Security (for notifications, Settings → Notifications) on your device. Revoking a permission does not delete data you previously created.

5. Children’s Privacy

Caldendrium is not directed at children under 13. We do not knowingly collect any information from children. If you believe a child has used Caldendrium, please be aware that the data they create is stored in their own Apple iCloud account, not with the developer.

6. Services the App Interacts With

Caldendrium interacts with the following services as part of normal device operation:

iOS platform features (on-device)

External apps you may launch via Share

When you tap “Share,” Caldendrium launches another app of your choice (for example Instagram, Mail, or Messages) through iOS APIs. Caldendrium does not transmit data directly to those services’ servers; whether to post or send anything from the launched app is entirely your choice.

Each service operates under its own provider, with its own privacy policy and terms of service. The developer does not have access to data flowing through these services on your behalf.

7. Access to Your Data by Other Apps and Services

The data you create with Caldendrium is stored in your own Apple Calendar and Photo library (see Sections 2 and 3). These are standard storage locations provided by iOS, and other apps or services you have authorized may also be able to access the same calendar and photo data. For example, another calendar app or photo management app you use, or Siri or an AI assistant you use, may access the same data within the scope of the permissions you have granted to it.

Whether to grant such access is something you control through iOS permission settings (Settings → Privacy & Security). Caldendrium cannot control the permissions you grant to other apps, nor how those apps handle your data. Each app or service operates under its own privacy policy and terms of service.

This follows naturally from the app’s design of keeping your data in your own standard storage locations. The same design is what leaves ownership and portability of the data with you.

8. Analytics, Advertising, and Tracking

Caldendrium does not include any analytics SDK, advertising SDK, or cross-app tracking framework. Apple’s App Tracking Transparency permission is therefore not requested.

9. Your Rights and Controls

Because we do not collect or store your information, there is no developer-side data to access, correct, or delete. To manage data you have produced with Caldendrium:

Rights granted by applicable law — such as Japan’s Act on the Protection of Personal Information, the EU GDPR, or California CCPA — to access, correct, or delete your personal data likewise have no developer-held data to apply to, because we do not retain your data.

10. Changes to This Policy

We may update this policy from time to time. When making material changes, we will set an effective date and, before that date, announce the changes and their effective date by posting them at https://caldendrium.com/privacy/. The “Last updated” date will be revised upon posting. Continued use of Caldendrium after such updates constitutes acceptance of the revised policy.

In the event of any inconsistency between the Japanese and English versions of this Policy, the Japanese version shall prevail. The English version is provided for convenience only.

11. Contact

For questions about this policy or Caldendrium’s privacy practices, contact us at:

The email address and message you send us are used solely to respond to your inquiry and are not shared with any third party. They are deleted after a reasonable period following the completion of our response.

Caldendrium is operated by an individual developer in Japan. We respond in English or Japanese.