Effective Date: May 20, 2026
Kizuki is a mood and emotional check-in app for iOS. It helps you reflect on how you are feeling through check-ins, journaling, optional AI reflections, reminders, and optional Circle features with people you choose.
We treat mood, emotional, reflection, and wellbeing information as sensitive health-category data. We try to collect only what we need to provide the app, and we do not sell your personal information.
Kizuki is a general wellbeing app. It is not a medical device, is not a mental-health treatment service, and is not intended for emergency or crisis use.
You may choose to add information such as mood ratings, emotion tags, life-context tags such as work, family, or sleep, written reflections, notes, vent or advice entries, onboarding goals, and onboarding struggles.
Your check-in data and reflections are stored locally on your device unless they need to be sent to provide a feature you choose to use, such as AI reflections, Circle sharing, feedback, or notifications.
You do not need to create an email or password account to use Kizuki. If you use Circle, Supabase creates an anonymous authentication session so the feature can work without an email/password login.
When you use an AI feature, Kizuki may send relevant information to a Cloudflare Worker proxy, which forwards the request to Anthropic's Claude API so a response can be generated.
This may include:
AI responses are generated from the information sent for that request. Cloudflare processes the request as our proxy provider. Anthropic may retain API inputs and outputs for a limited period, commonly up to about 30 days, for trust, safety, abuse prevention, legal, or service operation purposes, unless different terms apply to our account.
We do not use your mood or reflection data for advertising, and we do not ask AI providers to use your personal check-ins to build a user profile for cross-app tracking.
Kizuki uses Mixpanel to understand app usage and improve the product. Mixpanel may receive app events, screen views, onboarding steps, subscription actions, and device or app information. Mixpanel also assigns a distinct user or device identifier.
Some analytics events may include limited mood-related information. For example, a “Check In” event may include the mood value selected for that check-in.
We use analytics to understand product behavior, reliability, and feature usage. We do not use analytics data for third-party advertising, data broker sales, or cross-app tracking.
Kizuki offers monthly, yearly, and lifetime in-app purchase plans. Purchases are handled through Apple's in-app purchase system and RevenueCat.
RevenueCat helps us manage subscription status, purchase history, entitlement access, and restore purchases. RevenueCat assigns an anonymous app user ID unless a different app user ID is provided.
Deleting app data from Kizuki does not automatically cancel an active subscription. Subscriptions must be managed through your Apple App Store account settings.
Circle lets you share limited mood signals with people you choose. It uses Supabase for anonymous authentication and feature data storage.
Circle may process:
You should only connect with people you trust. People in your Circle may see the information that the feature shares with them, and they may save or share it outside Kizuki.
You may be able to change sharing settings, remove friends, or stop using Circle. Those changes are intended to affect future sharing, but they may not remove information someone already viewed or kept.
If you send a bug report or feature request, Kizuki may send your free-text message and helpful support context through our Cloudflare Worker proxy to a Slack webhook.
That support context may include your current mood, plan, total check-in count, app version, and anything you choose to write in the feedback message. Please do not include information you do not want us to review for support purposes.
Kizuki supports local daily reminders and Circle push notifications, including nudges. Local reminders can run on your device. Circle push notifications require a push notification token so notifications can be delivered to your device.
You can control notification permissions in your device settings. Turning off notifications may prevent reminders or nudges from appearing.
Kizuki is designed with a narrow data footprint. We do not:
We use a small number of service providers to operate Kizuki. These providers process information only for the purposes described in this policy and their own applicable terms.
Feedback messages may also be delivered into our Slack workspace via webhook so we can review bug reports and feature requests.
We may also use Apple services for app distribution, in-app purchases, diagnostics, and device-level notification delivery.
Local check-in and journal data stays on your device until you delete it in the app, reset app data if that option is available, or delete the app from your device.
AI requests are processed when you use an AI feature. Our Cloudflare Worker is intended to forward those requests to Anthropic, not to create a permanent journal copy. Cloudflare, Anthropic, and related infrastructure may keep limited logs or records for service operation, security, abuse prevention, debugging, legal compliance, or as required by their terms.
Mixpanel analytics data, RevenueCat subscription records, Supabase Circle data, push notification records, and Slack feedback messages are retained for as long as reasonably needed to provide the app, maintain purchases, operate Circle, respond to support requests, protect the service, comply with law, and honor deletion requests where possible.
Some records may remain in backups, security logs, provider logs, purchase records, or legal records for a limited time even after a deletion request. We cannot delete information that another Circle member already viewed, saved, or shared outside Kizuki.
You can delete local Kizuki data by deleting the app from your device or using any in-app delete/reset controls that are available. Because much of Kizuki is local-first and does not require an email/password account, we may need device or app identifiers from you to find provider-side records.
To request access, deletion, correction, or help locating data:
We will review requests in accordance with applicable law and our ability to identify the relevant data. If we cannot verify or locate the records, we may ask for additional information.
Depending on where you live, you may have rights to access, delete, correct, export, restrict, or object to certain processing of your personal information. You may also have the right to withdraw consent where processing is based on consent.
We will not discriminate against you for exercising privacy rights. Some requests may affect whether certain features can keep working, especially Circle, subscriptions, analytics opt-outs, or AI features.
Kizuki is not intended for users under 9. We do not knowingly collect personal information from children under 9. If you believe a child under 9 has provided information through Kizuki, please contact us and we will review the matter promptly.
We use reasonable technical and organizational measures to protect information processed through Kizuki. No app, device, network, or service provider can guarantee perfect security, so please use care when writing sensitive reflections or sharing mood signals with others.
Kizuki is for self-reflection and general wellbeing. It does not provide medical advice, diagnosis, treatment, crisis monitoring, or emergency response. AI reflections and Circle nudges may be supportive, but they are not a substitute for help from qualified professionals.
If you or someone else may be in immediate danger, contact local emergency services or a qualified crisis resource.
We may update this Privacy Policy from time to time. When we do, we will update the Effective Date at the top of this page. Continued use of Kizuki after an updated policy takes effect means you accept the revised policy.
If you have questions about this Privacy Policy or your data, contact us at: hello@kizuki.app