MuMu Calculator Privacy Policy

Effective Date: May 28, 2026

Welcome to MuMu Calculator ("the App," "we," "us," or "our"). We take your privacy seriously. This Privacy Policy explains how we collect, use, store, share, and protect information when you use the App.

Please read this Privacy Policy carefully before using the App. If you do not agree with all or part of this Privacy Policy, you may stop using the relevant features of the App.

1. Scope

This Privacy Policy applies to the features and services currently provided by MuMu Calculator, as well as related features that may be introduced later, including:

calculator features
local history, notes, recycle bin, and archive features
key sounds and voice readout
support by email
in-app feedback in supported versions or regions
Pro purchases provided through Apple in-app purchase

2. Information We Collect

2.1 Information you provide voluntarily

You may choose to provide information in the following situations:

when you contact us by email, including the contents of your message, your email address, and any other information you choose to provide
in versions or regions where in-app feedback is available, when you submit feedback, including your feedback content, optional contact information, and troubleshooting details such as app version, system version, and device model

2.2 Information generated when you use the App

To support the normal operation of the App, we may process the following information:

app version
iOS version
device model
anonymous device or app identifiers if required by future features
Pro purchase or restore status

2.3 Information processed locally on your device

The following information is typically stored locally on your device and is not actively uploaded to our servers unless you explicitly use a feature that requires it:

calculation expressions
calculation results
history records
note content
recycle bin content
archived data
settings such as decimal places, thousands separator, large number units, key sounds, and voice readout

2.4 Information we do not actively collect for core use

In the current version, the App does not actively collect the following information for its core functionality:

contacts
precise location
photos or photo library content
microphone recordings
camera content

Voice readout uses system speech synthesis to read text aloud. It is not a voice recording feature and does not require you to upload spoken audio to us.

3. How We Use Information

We use relevant information for the following purposes:

to provide and maintain the App's core functionality
to save your local settings and preferences
to support history, notes, recycle bin, and archive features
to provide key sounds and voice readout
to respond to support requests or feedback you choose to submit
to verify Pro purchases, restore purchases, and manage feature entitlements
to troubleshoot issues and improve reliability and user experience
to comply with applicable laws and regulations

4. How We Share Information

4.1 We do not sell your personal information

We do not sell your personal information.

4.2 Sharing with service providers or platforms

We may share information that is necessary to provide the relevant functionality in the following situations:

Apple: When you download the App from the App Store, rate it, share it, or make an in-app purchase, those flows are provided by Apple. We may rely on limited transaction status, entitlement status, or system capability information returned by Apple to confirm feature access.
In-app feedback service provider: In versions or regions where in-app feedback is available, the feedback you submit may be processed and stored through a third-party cloud service so that we can receive, review, and respond to your feedback.
Email service providers: When you contact us by email, the information you send is transmitted and stored by your email provider and by the email provider we use to receive support emails.

4.3 Transfers and public disclosure

We do not transfer or publicly disclose your personal information unless required by applicable law, regulatory authorities, legal process, or to protect our legitimate rights, users, or the public.

5. Data Storage and Retention

5.1 Local data

Calculation history, settings, notes, recycle bin content, and archives are generally stored locally on your device and remain there until you delete them, uninstall the App, or clear app data.

5.2 Support and feedback information

If you voluntarily send us support requests or feedback, we keep the information for as long as reasonably necessary to respond, troubleshoot, comply with legal obligations, and improve our services.

6. Your Rights

Subject to applicable law, you may generally have the right to:

understand how your information is processed
request access to, correction of, or deletion of information you voluntarily submitted to us
withdraw permission for optional features or stop using the App
stop future local data generation by uninstalling the App

If you would like to exercise any of these rights, please contact us using the details provided below.

7. Third-Party Services and Links

The App may contain links to, or rely on, third-party services such as:

App Store ratings and purchases
the system share sheet
email services

Those third-party services are independently operated by their providers and are subject to their own privacy policies and terms.

8. Children's Privacy

If you are a minor, please review this Privacy Policy with a parent or guardian before using the App. If we become aware that personal information has been processed in violation of applicable law, we will take appropriate steps as required.

9. Changes to This Privacy Policy

We may update this Privacy Policy from time to time due to product changes, legal requirements, or regulatory developments.

If an update materially affects your rights or changes the purposes, methods, or scope of personal information processing, we will provide notice through the App, a pop-up, an updated page, or another appropriate method where required.

We do not describe future advertising, analytics, or third-party capabilities as if they were already enabled.

If we add such capabilities later and they involve new privacy practices, we will update this Privacy Policy before release and, where required, provide additional notice or obtain consent.

10. Contact Us

If you have any questions, comments, or requests regarding this Privacy Policy, please contact us at:

Email: longlivefrom96@gmail.com