CalcLab

Publisher and scope

CalcLab is provided under the Safeeas brand. This policy covers its local-first Android tool functions.

Information used on your device

Expressions, history, variables, functions, graph settings and images selected or captured for formula recognition. Bundled formula models run on the device. Recognition results require review and can be wrong.

Network and third-party components

This release has no Internet permission and no advertising or publisher-operated content upload, account or synchronization service. Local content is not automatically sent to Safeeas. It includes Google ML Kit, which can initialize at startup. Google documents device and app diagnostics, usage metrics and installation identifiers. Some diagnostics can be handed to Google Play services, which has separate permissions. Removing this app’s Internet permission does not guarantee that diagnostic path is blocked. No supported in-app switch disables all of that SDK diagnostic path. Recognition itself runs on the device. Static review does not establish that a particular diagnostic was transmitted. ONNX Runtime’s automatic Android telemetry initializer is removed, and its native telemetry is disabled before formula-recognition sessions are created.

Permissions and optional features

Optional capture opens the system camera application; CalcLab does not request direct camera permission. Image selection uses Android pickers. Mathematical recognition uses bundled Pix2Text models and ONNX Runtime; a separate Latin-text fallback uses bundled Google ML Kit.

Export, backup and sharing

Use the supported local history and copy/share controls. Exported text and files are readable and are not end-to-end encrypted by CalcLab. A recipient or chosen document provider controls its own copies.

Delete your data

Delete history and saved values using the app controls, or clear Android app storage/uninstall for all private records. Original selected images and previously exported or shared copies are separate and are not removed by clearing CalcLab.

Accounts and cloud

No application account, email, password or subscription is required to use the local tools. This release has no account registration, sign-in, cloud backup or automatic synchronization. We do not create an application account that would require a separate account-deletion request.

Retention and recovery

Private records remain until you delete them, replace them using a supported restore, clear storage or uninstall. Android automatic app backup is disabled. Exported copies, original shared media and recipient/provider copies have their own retention and must be managed separately. Safeeas cannot recover unbacked-up local records. Third-party SDK diagnostic retention and deletion are governed by the linked provider policies; this app does not provide a remote SDK deletion control.

Security and your choices

Android private storage restricts ordinary access by other apps. The app does not add an app-wide encryption layer to local content or readable exports. Protect your device and chosen destinations. You can revoke permissions in Android Settings. A file picker or share sheet can hand selected material to an application with its own Internet access. Review that recipient before sharing private content. There is no publisher-operated sensitive-content upload in this release.

Purpose and limitations

Calculations and recognition are fallible and limited to the supported mathematical domain. Review inputs and results; do not rely on them for medical, financial, engineering-safety or other high-stakes decisions without independent verification.

Younger users

This app is intended for people aged 13 and over, including teenagers, and is not designed for children under 13. Local tool functions do not require a name, age or application account. We do not verify ages or provide an in-app parental-control service. We do not operate child profiles, messaging, a public community or advertising in this release. Teenagers should review optional permissions and export destinations with a parent or guardian when appropriate. Parents or guardians can manage device permissions and remove local records using Android controls. Contact us about privacy concerns without sending a young person’s private content unnecessarily.

Information you send to support

If you email xiaozhu7888@gmail.com, your email provider and ours process your address and the message you choose to send for support. Avoid sending recordings, private photos or documents unless necessary for your request. Support email is separate from local tool use; the app does not send an email automatically.

Contact and updates

Privacy and support contact: xiaozhu7888@gmail.com. Last updated: 24 October 2026. We will update this policy before enabling new account, network or upload functionality. Review the linked provider policies for their own processing terms.

Provider information

• Google ML Kit Android data disclosure: https://developers.google.com/ml-kit/android-data-disclosure
• Google ML Kit privacy terms: https://developers.google.com/ml-kit/terms#privacy
• ONNX Runtime Java environment API: https://onnxruntime.ai/docs/api/java/ai/onnxruntime/OrtEnvironment.html