Privacy Policy

Last updated: 11 July 2026 · Applies to the Dayden app and website.

The short version

Dayden is private by design. We collect the minimum needed to run your account, we show no ads, we use no third-party trackers or analytics, and we never sell or share your data.

What we collect

• Account details: your email address (and, if you sign in with Google, your Google account email). Used only to sign you in and, rarely, to contact you about your account.
• Your app data: the priorities, habits, lists, meals, spending entries, goals and reviews you create. This lives on your device and is backed up to your private account space so it can sync between your devices. It is transmitted over encrypted connections (HTTPS/TLS) and stored on Google Firebase infrastructure.
• Licence record: which licence code your account redeemed, so your purchase unlocks the app on all your devices.
• Security/audit log: a record of account-security events — sign-in sessions, account creation, licence redemption and sign-out — each with a timestamp, the IP address the request came from and the browser/device type (e.g. "Chrome on Windows"). This is kept in a protected, tamper-resistant audit trail and is used for two purposes only: (1) the security and integrity of your account, and (2) enforcing the one-person licence — for example, detecting when one account's credentials are being shared between many people (our legal basis is legitimate interest under Article 6(1)(f) GDPR). This is a first-party security measure. It is not behavioural or marketing analytics, is never used for advertising, and is never shared or sold. It does not record what you type or which features you use inside the app.

What we do NOT do

• No advertising, no ad identifiers.
• No analytics or behavioural tracking.
• No selling, renting or sharing of personal data with third parties.
• No health or medical data is collected by default. Dayden is a life organiser, not a health app. The one exception is the optional cycle & pregnancy tracker, described below, which is off unless you switch it on.

AI features

Dayden's AI features are on-device. The “Quick capture” tool is simple pattern-matching that runs in your browser. The AI helper (summaries, turning notes into tasks) uses your browser's own built-in AI model where available (currently Chrome and Edge on desktop) — the text is processed entirely on your device and is never sent to us or any third-party AI service. There is no cloud AI, no API calls, and nothing about your notes leaves your computer.

Optional trackers (off by default)

Dayden includes optional trackers that are all switched off by default: a period & pregnancy tracker, a mood log, a medications tick-list, a water tracker, a car/home maintenance log, and prayer times. If you turn one on in Settings, what you choose to log (for example period dates, daily moods, medication names, or — for prayer times — your approximate location) is stored with the rest of your private app data: encrypted in transit, held in your own account space, visible only to you, and never shared, sold or used for anything except showing you your own entries.

Some of this can be special-category data under GDPR — cycle dates, moods and medication names relate to health, and using the prayer-times feature may indicate a religious belief. We only process such data with your explicit consent (Article 9(2)(a) GDPR): switching the tracker on is how you give that consent, and you can withdraw it at any time by deleting your entries or your account. Predictions, due dates and calculated prayer times are estimates for personal planning — not medical or religious authority.

Where data is processed

Authentication and backup storage are provided by Google Firebase (Google LLC). Google acts as our data processor; your data is protected by encryption in transit and at rest. See Firebase's privacy documentation.

Your rights

You can export all your data at any time from Settings → Data → Export. You can delete your account and all cloud data yourself from Settings → Account → "Delete account & cloud data" (or by emailing us); deletion removes your data from our systems. Security-audit records may be retained for a limited period where required for security and integrity. If you are in the UK/EU, you have the rights set out in UK GDPR/GDPR, including access, rectification, erasure and portability.

Data retention

Your data is kept while your account exists. Delete your account and it is removed. Local data on your own devices is under your control. Security-audit records (described above) are retained only for as long as needed for security, fraud prevention and licence enforcement, and are then deleted.

Children

Dayden is not directed at children under 13 and we do not knowingly collect data from them.

Contact

Data controller: the Dayden developer. Contact: info@dayden.app

← Back to Dayden