InkCalc Privacy Policy
InkCalc ("the App") respects your privacy. This policy explains how the App handles information.
1. The Developer Collects Nothing
The developer of the App (SOGAKEN) does not receive any personal information, usage logs, or analytics data from users. There is no developer-operated server, and no telemetry, crash reports, or usage statistics are sent.
2. Information Stored Locally Only
The following information is stored on your Mac. None of it is transmitted externally unless you use the AI features (see Section 3 for AI usage).
| Information | Storage location |
|---|---|
Calculation notes (.inkcalc files) |
A folder you select via the macOS open panel (local or iCloud Drive) |
| AI backend API keys |
macOS Keychain (App-specific area, service name
jp.inkcalc.app.ai)
|
| App settings (font size, decimal places, menu-bar mode, etc.) | macOS UserDefaults (within the App sandbox) |
| Folder-access security-scoped bookmarks | UserDefaults |
App Sandbox restricts the App's access to the folder you select and the App's own private area.
3. External Transmission for AI Features
If you enable the AI features in Settings and select Anthropic Claude or OpenAI ChatGPT as the backend, the following information is transmitted via HTTPS to the corresponding API server.
| Feature | Information sent |
|---|---|
| AI Generate Expression (⌘⇧I) | The natural-language text you enter |
| AI Fix Error (⌘⇧F) | The single line that produced the error and the error message |
| AI Summarize Note (⌘⇧M) | The full note text and per-line evaluation results |
| AI Infer Intent (⌘⇧J) | A question-form comment line plus the full note context and per-line evaluation results |
Recipients and handling:
- Anthropic (Claude): https://www.anthropic.com/legal/privacy
- OpenAI (ChatGPT): https://openai.com/policies/privacy-policy/
These data are processed according to each provider's privacy policy. The App developer does not relay, replicate, or store them.
When Apple Intelligence is selected as the backend
Inference is handled by Apple's Foundation Models framework. It typically completes on-device on your Mac, but Apple may route compute-heavy requests to Apple Private Cloud Compute (PCC). PCC is an end-to-end encrypted infrastructure designed by Apple, where Apple itself cannot access the inference content.
Details: https://security.apple.com/blog/private-cloud-compute/
The App developer does not relay, replicate, or store data, regardless of which backend you select.
While Apple Intelligence is the active backend, no data is sent to ChatGPT or Claude APIs. When you choose Anthropic or OpenAI as the backend, the data described in the table above is sent to the respective API.
When AI is not used
If no API key is configured and AI is disabled (or explicitly turned off), no transmission occurs.
4. Currency Rate Fetching
When you use currency conversion features such as
100 USD in JPY, the App makes an HTTPS request to a
public API to fetch the latest exchange rates. Only the rate request
is sent — your note content is not included.
5. iCloud Sync
If you select an iCloud Drive folder as the storage location, your files are synchronized with your other Apple devices through Apple's iCloud service. This is a standard macOS iCloud Drive feature, and the App does not access the synchronized content. Apple's privacy policy applies: https://www.apple.com/legal/privacy/
6. Third-Party Sharing
Because the App developer does not retain any user data, no data is provided to third parties.
For data transmitted via the AI features (Section 3), the data is sent directly to the API provider you select (Anthropic or OpenAI). Subsequent handling is governed by each provider's policies.
7. Children's Privacy
The App is not intended for any specific age group, and we do not intentionally collect personal information from children.
8. Data Deletion
| What you want to delete | Action |
|---|---|
| Individual notes | Delete the .inkcalc file from Finder |
| API keys | Empty the API key field in Settings > AI (this removes them from Keychain) |
| All App data |
Delete the App, then remove
~/Library/Containers/jp.inkcalc.app/ from Finder
|
9. Changes
This Privacy Policy may be updated without notice. When significant changes are made, the "Last updated" date at the top of this document will be updated.
10. Contact
If you have questions or concerns, please contact us:
- GitHub Issues: https://github.com/SOGAKEN/InkCalc-support/issues