In one sentence: Chalculate’s keyboard and core calculations contain no networking at all — what you type and calculate stays on your device, and nothing is uploaded automatically. The only exception: if you voluntarily contact us via the support email, we receive what you send (see Section 7).
1. Zero-Network Architecture
Both the main app and the keyboard extension contain no networking capability whatsoever: no network code, no network permission requests, no servers. You can verify this from the App's privacy label and the system's network permission list.
2. No Automatic Data Collection
The App does not automatically collect any data: no personal information, no account required; no third-party analytics, crash-reporting, advertising or tracking SDKs; nothing is sold, shared or transferred. The App has no servers and never uploads your calculations, settings or input.
3. About "Full Access"
Full Access is used solely for on-device purposes: reading text already in the input field (to continue expressions typed earlier), haptic feedback, spoken key results, and copying a history entry to the clipboard when you explicitly tap copy. All processing occurs locally; the App contains no networking code. If Full Access is disabled, typing and calculation still work within the keyboard session; only reading existing text, haptics, key voice and history copy are unavailable.
4. Data Stored on Your Device
The following data lives only on your device (in the App's local container and App Group storage) and is deleted when you uninstall: app settings (theme, key sounds, language preferences); calculation history shown in the history panel; and free-quota counters (first-use date, daily/total usage). Quota is counted per device and never syncs across devices.
5. System Permissions
Notifications (optional): used if you enable on-device reminders such as trial-expiry notices. Content is generated locally and never passes through a server. Declining does not affect any feature.
Photos: the Pro "theme from photo" feature uses the system photo picker — you explicitly pick one image, which is processed locally for theme colors. The App requests no photo-library permission and never uploads the image.
6. Children's Privacy
The App is not directed at children under 13, and the App itself does not automatically collect any personal data. If you believe a child sent information to us via the support email, contact us at the address below to have it deleted.
7. Changes & Contact
Updates to this policy are posted on this page with a new effective date; significant changes are highlighted with app updates. Privacy questions: [email protected]. If you contact us for support, we receive what you choose to send (e.g., your message, device model, app version, optional logs or screenshots you attach); we use it only to answer and fix the issue, retain it no longer than needed, and delete it on request.