Math by Voice: Mental Math

X-PlanetMath (Math by Voice) is a voice-first mathematics learning app for children and adults. Speak answers aloud, choose learning activities with voice commands, and explore mathematical topics step by step. Manual input is available only where it is genuinely useful. KEY FEATURES • voice navigation and spoken answers; • a structured course of 10 interactive math lessons; • addition, subtraction, multiplication, and division; • fractions, percentages, powers, roots, and equations; • configurable practice sessions; • tests with increasing difficulty; • narrated mathematical terms and explanations; • statistics and saved progress; • English and Russian languages; • no advertising or required account registration. 10 INTERACTIVE MATH LESSONS The course progresses from counting and arithmetic through fractions and formulas to equations, powers, and quadratic equations. Lessons combine spoken explanations, visual material, questions, and saved results. VOICE PRACTICE Choose an operation, difficulty, number of questions, and answer time. X-PlanetMath reads each problem aloud, listens to the spoken answer, and provides immediate feedback. WHO IT IS FOR • children learning mathematical foundations; • students practicing mental arithmetic; • adults maintaining calculation speed and concentration; • learners who find spoken interaction more convenient than typing. Microphone permission is required for voice features. Offline speech-recognition availability depends on the device and installed speech service. Basic practice is available free of charge. Premium unlocks all operations and advanced learning modes with a one-time in-app purchase—no subscription.