Effective date: August 18, 2026
Who we are
Cal. is developed and maintained by Daren Irlen, operating as Feather Studio. References to "we", "us", or "our" in this policy refer to Feather Studio. You can reach us at featherstudio@proton.me.
What data Cal. stores — and where
Cal. stores the following data locally on your device only, using Apple's standard UserDefaults and local file storage:
- Events you create in Cal. (title, dates, category, notes, repeat rules, reminders)
- Notes you write in the Notes journal
- Your category customisations (names, colours, keywords)
- Your app preferences (theme, time format, week start, default durations)
- Your selected calendar identifiers for EventKit sync
None of this data is transmitted to Feather Studio's servers. We do not have access to your calendar events, notes, or any content you create in Cal.
Calendar data (EventKit)
If you enable Calendar sync, Cal. requests access to your iPhone's calendar data through Apple's EventKit framework. This allows Cal. to:
- Read events from the calendars you select (Apple Calendar, Google Calendar, Outlook, etc.)
- Write events you create in Cal. to a dedicated "Cal." calendar in Apple Calendar
Calendar data accessed through EventKit stays on your device and syncs through your own Apple ID or Google account — not through Feather Studio. Cal. does not read, store, or transmit your calendar data to external servers.
Voice input and speech recognition
Cal. uses Apple's Speech Recognition framework (SFSpeechRecognizer) to convert your voice to text. Apple may transmit audio to its servers for processing, subject to Apple's Privacy Policy. Feather Studio does not receive, store, or process any audio or voice data.
Voice language preferences (English, French, Spanish, or device default) are stored locally on your device only.
Notifications
If you enable notifications, Cal. schedules local notifications on your device using Apple's notification framework. These notifications are generated and delivered entirely on-device. No notification content is transmitted to Feather Studio's servers.
Analytics and third-party services
Cal. does not use any third-party analytics, tracking, or advertising services. We do not collect usage data, crash reports, or behavioural analytics.
Purchases made through Cal. Pro are processed by Apple through the App Store. Apple's privacy practices for in-app purchases are governed by Apple's Privacy Policy.
Data retention and deletion
All data created in Cal. is stored locally on your device. Uninstalling Cal. removes all local data. There is no server-side account, so we cannot retrieve or delete data on your behalf — because we never had access to it.
If Calendar sync is enabled, events written to your "Cal." calendar in Apple Calendar will remain in Apple Calendar after Cal. is uninstalled, since that data belongs to your Apple ID.
Children's privacy
Cal. is not directed at children under the age of 13. We do not knowingly collect personal information from children.
Changes to this policy
If we make material changes to this policy, we will update the effective date above and post the revised version at this URL. Continued use of Cal. after changes are posted constitutes acceptance of the updated policy.
Contact
Questions or concerns about this policy? Reach us at featherstudio@proton.me. We aim to respond within 48 hours.