NowThis

Privacy-first, self-hosted CalDAV task manager for iOS.

Feature Highlights • Installation • Technical Details • Contributing

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Important

NowThis is built natively in Swift, SwiftUI, and SwiftData.

NowThis is a powerful, local-first iOS task manager that seamlessly syncs with any CalDAV server (including Nextcloud). Manage your to-dos, set geofence reminders, link journal entries, and keep your data 100% yours.

Feature Highlights

• 🔒 Local & Synced Modes: Use Vault Mode for a purely offline experience, or connect to a CalDAV server (Nextcloud, etc.) to sync across devices.
• 📍 Geofence Reminders: Location-based task notifications (e.g., "Remind me when I get home").
• 🔄 Reliable CalDAV Sync: Robust background sync with ETag-based conflict detection to prevent silent overwrites.
• 📝 Journal Links: Attach journal entries to tasks for extended context.
• ⚡ Native Performance: Built from the ground up with SwiftUI and SwiftData for lightning-fast responsiveness.

Installation

For Users

The easiest way to get NowThis is through the App Store (coming soon!).

For Developers

NowThis uses XcodeGen to manage its project structure.

1. Clone the repository:

   git clone https://github.com/asecretcompany/nowthis-source.git
   cd nowthis-source

2. Install XcodeGen if you don't have it:

   brew install xcodegen

3. Set your Apple Developer Team ID:

   cp Local.xcconfig.template Local.xcconfig
   # Edit Local.xcconfig and add your TEAM_ID

4. Generate the Xcode project:

   xcodegen generate

5. Open NowThis.xcodeproj and build!

(Note: The bundle identifier defaults to com.asecretcompany.nowthis. If you are building for your own physical device, you may need to update the bundle identifier prefix in project.yml.)

Technical Details

• Architecture: iOS client leveraging SwiftData for local persistence and CloudKit (via App Groups) for widget/app target data sharing.
• Sync Engine: Custom-built CalDAVClient using os.Logger for observability and actor-based concurrency for safe data handling.
• Security: KeychainManager securely stores server credentials with kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly.

Contributing

We welcome contributions! Please check out our GitHub Pages site for more detailed documentation.

All code is licensed under the GPLv3 License.