Mumu Calculator Support

If you need help with Mumu Calculator, please check the FAQ below first. If the issue is still unresolved, you can contact us by email.

Frequently Asked Questions

How do I restore my Pro purchase?

Open the app, go to Settings > Upgrade to Pro, then tap Restore Purchases.

How does the complimentary Pro trial work?

New users may receive a complimentary 7-day Pro experience inside the app. This is not a subscription and does not require a purchase. After it ends, you can continue using the free version or unlock Lifetime Pro.

Why do I see an ad when opening the app?

After the complimentary Pro trial ends, free users may see an ad when opening the app after it has been fully closed. Lifetime Pro users do not see ads when opening the app.

How do I manage advertising privacy choices?

Where required, Mumu Calculator uses Google's User Messaging Platform to request or manage advertising consent and privacy choices. If privacy options are available in your region, you can find them from Settings.

How does editable history work?

Tap a history entry to restore it to the editor and continue calculating from that expression.

How do notes and subtotals work?

Add a note to a group of calculations. When Group Subtotals is enabled, the app shows a subtotal at the end of that group.

How do I enable Voice Readout?

Open Settings > Voice Readout. Voice Readout is available with active Pro access, including a complimentary trial, and uses the system voice to read numbers, operators, and results aloud.

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If the FAQ does not resolve your issue, you can contact us by email:

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