Privacy

Calendum has no server and no account. There is nothing for us to collect.

The short version

• No account, no sign-up, no login.
• No server of ours. We operate no backend that receives your data.
• No analytics SDK, no advertising SDK, no third-party code of any kind.
• No tracking, no profiling, no data sold or shared. Ever.

Your calendars and reminders

Calendum reads and writes your calendars and reminders through EventKit, Apple's own framework, directly on your device. Whatever accounts you have set up in iOS — iCloud, Google, Exchange, or anything else — are reached through Apple's software, using the permissions you grant in Settings. Calendum never contacts those services itself and never sees your account credentials.

Your event titles, notes, and attendees never touch us — Calendum has no server for them to reach. The names of the calendars you pick for a protection rule become part of that rule's settings, and those settings sync only through your own private iCloud — we can't read them.

Blocks Calendum creates

When a protection rule blocks time on one of your calendars, Calendum writes an event to that calendar through EventKit, exactly as you would by hand. That event carries a small marker so Calendum can recognise and clean up its own work later. By default the block is titled simply "Busy" and carries no detail about the event that triggered it — that is the entire point: the people who can see your work calendar learn that you are busy, not why.

Each rule has a "Show real titles" option. If you switch it on, blocks from that rule carry the original event's title instead, and anyone who can see that calendar can read it. That is your choice, made per rule, and you can turn it off at any time. Blocks you create for your own tasks work the same way: the title is "Busy" unless you choose otherwise.

iCloud

Calendum's own data — your tasks, protection rules, and settings — is stored on your device and synced between your devices through CloudKit's private database, which is part of your personal iCloud account.

This is Apple infrastructure under your Apple Account, not ours. We cannot read it, query it, or access it in any way, and no data is sent to any server operated by Calendum. If you are not signed in to iCloud, Calendum works fully on the device and simply does not sync.

Location

Calendum never asks for your location unless you turn on "Sync when you move around" in Settings. The switch is off by default. When it is on, iOS wakes Calendum after your device moves a significant distance so it can re-verify your protected time in the background. Movement is only the wake-up signal: your location is never read, stored, or sent anywhere — the coordinates are discarded without being looked at. Turn the switch off and location access ends with it.

Diagnostics

Calendum uses MetricKit, Apple's own framework, to record hangs — moments the app froze — on your device so performance problems can be found and fixed. These reports stay on your device unless you choose to send them.

If you use the feedback option in the app, it opens Apple's standard mail composer with a prefilled message. You can read and edit every word, including the technical details, before you send it — and you can delete any part of it. Nothing is sent unless you tap send. Those details cover app and system versions, device model, locale and time zone, the types and number of your calendar accounts, counts of your calendars, rules, and busy events created by rules, the state of iCloud sync, your trial or purchase status, and how many freeze reports are waiting on the device. They never include calendar names, event titles, or account addresses.

Purchases

Purchases are handled entirely by Apple through the App Store. Calendum never sees your payment details. The record of whether you have purchased is held by StoreKit on your device and in your App Store account.

Children

Calendum is not directed at children and collects no personal information from anyone, of any age.

Changes

If this policy changes, the revised version will be posted here with a new date. Material changes will also be noted in the app's release notes.

Contact

Questions about privacy go through the support page.

Last updated: DRAFT, unpublished.