Yes! Although, it changes depending upon the noun. If it's masculine the correct spelling is cuántos, but if the noun is feminine, the correct spelling is cuántas. I.E. ¿Cuántos vasos necesitas? How many glasses do you need. The noun is masculine, so you'll use cuántos. As opposed to, ¿Cuántas tazas tenías? How many cups do you have? Tazas (cups) is feminine, so you use cuántas. In English we do not designate our words as masculine or feminine, so it can be a bit confusing if you're not familiar with the concept. I studied French for eight years, and it has been a great help while learning Spanish. If you practice your vocabulary, and pay attention to the category each word falls into, you will pick up the language quickly. :)
Someone said the voices are TTS. So, they should not make mistakes when it comes to accents. México is pronounced Mexíco, as bolígrafos is still being pronounced boligráfos. I should think that is an easy thing yo amend. And DUO, please, while you're at it, get rid of the 'bored and toneless' woman voice as well as of the little 'vampire'. TTS is supposed to deliver a human‑like and engaging experience, the kind of pronunciation we expect to hear in Spanish speaking countries. Thank you.