Privacy Policy

Last updated: 22 May 2026

Blockday is a productivity app made by Atrium (the developer of record: Zhang Jiahao). This policy explains what data the app does and does not handle. The short version: Blockday is account-free and we operate no server. Your tasks live on your device and your iCloud only.

What we collect

Nothing. We do not run any server, we do not operate an analytics or crash-reporting pipeline, and we ship no third-party SDKs that contact a network at runtime. We do not use the IDFA. We do not fingerprint your device.

What stays on your device

• Your tasks, time blocks, subtasks, notes, recurrences, templates, and Pomodoro history — stored locally with file-protection level "Complete" and (if you opt in) mirrored to your iCloud private database via CloudKit. Apple end-to-end encrypts CloudKit private data.
• Your preferences (theme, reduce-motion, workday hours, completion-haptic toggle) — stored in NSUbiquitousKeyValueStore so they sync across your Apple devices.

System permissions Blockday may request

• Notifications — to alert you when a Pomodoro finishes. Never used for marketing.
• Calendars (Full Access) — to read existing events for context on your timeline and (optionally) write Blockday blocks into a dedicated "Blockday" calendar.
• Reminders (Full Access) — to two-way sync unscheduled tasks with a "Blockday Inbox" reminder list.
• Focus Status — to filter the visible task list to the active Focus.

All four are optional and deferred until the moment the feature is invoked. You can revoke any of them at any time in iOS Settings.

Apple Intelligence

On Apple-Intelligence-eligible devices running iOS 26 or later, Blockday uses Apple's FoundationModels framework to generate auto-schedule suggestions and weekly summaries. These calls run entirely on-device. Apple's framework does not send your inputs over the network. We never see them either.

StoreKit

Subscriptions are processed by Apple via StoreKit. We see only the transaction identifier and product ID that StoreKit gives us locally, which we use to unlock features. We do not receive any other purchase information.

Children

Blockday is rated 4+. It contains no targeted advertising, no third-party SDKs, and no account-based data collection.

Changes

If this policy ever changes materially, we will update the date at the top and surface a notice inside the app.

Contact

Questions: jasperabundant@gmail.com