Privacy Policy 隐私政策

1. Overview

Sketella ("the App") is a conversational AI calendar assistant. We respect your privacy and are committed to protecting your personal data. This policy explains how the App handles your information.

2. Data We Collect

Your calendar, reminders, and chat history stay on your device. We do not maintain user accounts or external databases for personal content. The following is created and stored locally:

• Chat messages between you and Sketella
• Conversation sessions and titles
• App preferences (default calendar, reminder settings, time defaults, language)
• Quota usage counters (number of AI calls per month)

Calendar events and reminders Sketella creates on your behalf are written directly to Apple's native Calendar and Reminders apps via EventKit. They live in your iCloud account if you have iCloud Calendar / Reminders sync enabled — that sync is between you and Apple, Sketella has no role in it.

We do not use analytics, tracking, or advertising SDKs. We do not collect device identifiers beyond an anonymous device token used solely for AI proxy authentication (see §3).

3. AI Conversational Features

Before the first AI request, the App asks for your permission to use real-time AI processing. If you allow it, Sketella sends only the content you choose to submit — typed text, shared text or links, images or files, OCR text, and voice audio or transcripts — plus limited context such as current date, timezone, preferences, and recent events from the current conversation.

Requests are routed through our secure server (a Cloudflare Worker), which forwards them to the relevant AI or speech provider. Your message is identified only by an anonymous device token. We do not send your full calendar, contacts, location, name, email, or Apple ID.

This content is processed in real time to fulfill your request. We do not store it on our servers after the request is completed, and it is not used by Sketella for advertising, tracking, or model training. Conversation history shown in the chat UI lives only on your device.

4. Voice Input

When you use voice input, your iPhone streams microphone audio (16 kHz PCM) directly to ElevenLabs Scribe v2, a third-party speech recognition service, via a one-time short-lived token issued by our server. The transcription is streamed back to your device. We do not store audio recordings or transcripts on our server. ElevenLabs's privacy policy applies to the audio stream itself; per their policy, audio is not retained beyond the processing window.

5. Photo OCR

The App requests camera and photo library access for the photo-to-event feature. Images are sent to our secure server for AI-based text and event extraction. Images are processed in real time and discarded immediately after extraction. We do not store images or the extracted text on our server.

6. Shared Content Import

When you share text, links, images, PDFs, or email content to Sketella through the iOS Share sheet, the shared content is stored briefly in an App Group container on your device so the main app can import it. Text, images, and documents may be sent to our secure server for AI-based event extraction after you open Sketella. The content is processed in real time and not retained beyond the processing window.

7. Calendar & Reminders Permissions

The App requests Calendar and Reminders permission to create events and reminders on your behalf. Sketella only writes events that you have explicitly confirmed via the chat interface. You can revoke either permission at any time in iOS Settings → Privacy & Security.

8. Purchases

In-app purchases are processed entirely by Apple through StoreKit. Sketella does not have access to your payment information, Apple ID, or billing details. Subscription status is verified through Apple's StoreKit framework.

9. Third-Party Services

Sketella relies on the following external services:

• Cloudflare — hosts our secure API proxy, which routes AI requests without exposing model-provider keys in the iOS app.
• AI model providers (Google Gemini, DeepSeek, DashScope/Qwen, and hiapi-relayed Gemini) — receive user-submitted content only as needed for real-time AI processing.
• ElevenLabs — for real-time speech recognition. Audio streams directly between your device and ElevenLabs, authenticated via a short-lived token from our server.
• Apple StoreKit — for in-app purchase verification, handled by the operating system.

We require third-party providers that handle request content to provide the same or equivalent protection for this limited processing. We do not authorize the use of Sketella request content for advertising or tracking. We do not integrate advertising networks, analytics SDKs, or social media tracking.

10. Data Retention & Deletion

Since chat history and preferences are stored locally on your device, you have full control:

• Delete individual conversations in the chat list at any time
• Reset all preferences via Settings
• Uninstalling the App permanently removes all locally stored data
• Calendar events and reminders Sketella created are stored in Apple's Calendar / Reminders apps and follow Apple's data lifecycle. To delete them, use the Calendar / Reminders apps directly, or use Sketella's "Clean up all calendar events created by Sketella" maintenance tool in Settings

The anonymous device token is automatically invalidated 90 days after the App's last network request.

11. Children's Privacy

Sketella does not knowingly collect information from children under 13. The App is rated 4+ and does not require any personal information to function.

12. Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be reflected in the App with an updated effective date. Continued use of the App after changes constitutes acceptance of the updated policy.

13. Contact

If you have questions about this Privacy Policy, please contact us at [email protected].