Matinformatics support

Scientific Calculator FX-991CW Support

Find quick answers below or email us with the details of what happened.

Email support

Common questions

A few quick answers.

Does the app work offline?

Yes. Calculations and local history work on your device without an internet connection.

Which features are included for free?

Calculate and Complex modes are available for free. Scientific Calculator Pro unlocks the advanced modes through monthly, yearly, or lifetime access.

Where are my calculations stored?

Calculation history stays locally on your device. Matinformatics does not receive or store it.

Is this an official calculator-manufacturer app?

No. This is an independently developed app and is not affiliated with or endorsed by any calculator manufacturer.

Help us reproduce it

Include the app version, iOS or iPadOS version, device model, steps to reproduce, and what you expected to happen. Screenshots are welcome, but never send passwords, payment-card details, or other sensitive information.

Purchases and billing

Apple processes App Store purchases and payment details. For billing or refund requests, visit Apple’s Report a Problem service.

Your calculations stay private

Entries, results, and calculation history stay on your device and are not sent to Matinformatics. Read the app privacy policy.