Voice Calculator is an AI math calculator that uses voice as its primary input method—users simply say the expression and get the answer. It offers both a free web version and an iOS app.
Purpose It is suited to situations where you need to calculate while doing other things, such as comparison shopping, splitting bills, everyday quick math, and unit and time zone conversions. It is also suited to people who have difficulty typing, such as students with dyslexia or dyscalculia, children, or users with poor vision.
Main capabilities
- Voice calculation: Tap the microphone and say the expression in natural spoken language, such as "35 times 12," "20% of 80," or "1250 divided by 4 plus 18." The recognized text is displayed above the answer for easy verification.
- Basic operations: The free web version supports addition, subtraction, multiplication, and division, percentages, powers, and roots, and can handle decimals.
- Read answers aloud: The web version can enable "Read answers aloud" to read the result using the browser's speech synthesis. The iOS app can read aloud via VoiceOver or Speak Screen.
- AI word problems (iOS): After a one-time payment unlock, it can solve text problems, such as "split an $85 bill among 4 people and add a 15% tip," "for a $300,000 loan at 4.5% interest over 30 years, what is the monthly payment," and "which is a better deal: 10 items at $3.99 or 12 items at $4.99," and it shows the calculation steps.
- Unit and time zone conversion: Supports conversion of units such as temperature and distance, as well as time zone conversion, such as "what is 72°F in Celsius" and "when it is 3 p.m. in New York, what time is it in Tokyo."
- Multiple languages: The website and the free web calculator support 19 languages, including English, Spanish, Portuguese, French, German, Italian, Russian, Ukrainian, Polish, Dutch, Arabic, Hindi, Bengali, Japanese, Korean, Indonesian, Filipino, and Simplified and Traditional Chinese. Most languages can recognize spoken numbers; Polish and Ukrainian currently read numbers and symbols aloud rather than spelling out words. The iOS app follows the iPhone's speech recognition language.
How to use it
- Web version: Open voicecalculator.app, tap the microphone, and say the expression directly—no account, no installation, and no time limit; you can also switch to keyboard input in a quiet environment.
- iOS app: Free to download, and basic voice calculation is free; the AI feature requires a one-time payment of $7.99 to unlock, with no subscription and no ads. System requirements: iOS 16 or later, and it supports only iPhone and iPad.
Use cases Hands-free calculation when both hands are busy (such as cooking, shopping, or measuring); shopping discounts, price comparison, bill splitting, and tip calculation; everyday multi-step math problems for students and professionals; unit and time zone conversion.
Limitations
- AI word problems, general questions, and multi-step reasoning are available only in the iOS app and require a one-time payment unlock; the free web version handles only direct expressions.
- There is no native Android or Windows app.
- Offline capability is limited: after the page loads, basic keyboard-input calculations still work, but the AI feature requires an internet connection, and browser speech recognition also depends on the browser's speech service.
- Voice input uses the browser's built-in speech recognition and requires granting microphone permission once; the official statement says that user audio is not recorded or uploaded, and the AI feature only sends the transcribed text to the language model and does not store it permanently.
- Web version voice input is available in Chrome, Edge, and Safari; in other browsers, keyboard input can be used.
- The U.S. App Store rating is 4.4 (81 ratings).
